Sveinung Berntsen Stølevik

• Western, Benedikte; Ivarsson, Andreas; Vistad, Ingvild; Demmelmaier, Ingrid; Aaronson, Neil K. & Radcliffe, Gillian [Vis alle 47 forfattere av denne artikkelen] (2024). Dropout from exercise trials among cancer survivors—An individual patient data meta-analysis from the POLARIS study. Scandinavian Journal of Medicine & Science in Sports. ISSN 0905-7188. 34(2). doi: 10.1111/sms.14575.
• Fosstveit, Sindre Herskedal; Lohne-Seiler, Hilde; Feron, Jack; Lucas, Samuel J. E.; Ivarsson, Andreas & Berntsen, Sveinung (2024). The intensity paradox: A systematic review and meta-analysis of its impact on the cardiorespiratory fitness of older adults. Scandinavian Journal of Medicine & Science in Sports. ISSN 0905-7188. 34(2). doi: 10.1111/sms.14573.
• Sundfør, Hanne Beate; Berntsen, Sveinung; Bere, Elling Tufte & Fyhri, Aslak (2024). The effects of subsidising e-bikes on mode share and physical activity - A natural experiment. Journal of Transport and Health. ISSN 2214-1405. 35(March 2024), s. 1–13. doi: 10.1016/j.jth.2023.101752. Vis sammendrag

  Introduction The promotion of increased cycling is a political goal in numerous countries due to its environmental and public health benefits. Initiatives to stimulate e-bike use, like subsidies, may be a relevant strategy. However, understanding of the effects of these subsidies remains limited. In the present study our aim was to investigate the short-term effects of subsidising e-bike purchases on mode share distribution, physical activity derived from daily travel, and overall levels of physical activity. Methods We used the 2020-subvention program in Oslo, Norway, as a natural experiment, employing a pre-post randomised group design. The trial group (N = 194) and control group (N = 2174) participated in a survey at two time points (in April and September 2021), which included a one-day travel diary and questions about physical activity over the previous week. Results Our findings revealed a significant 12.6 [7.2, 18.0] percentage point increase in bicycle mode share, followed by a decrease in the share of car and public transport usage of 10.1 [-15.9, −2.5] and 7.1 [-11.8, −2.4] percentage points. In terms of physical activity generated from daily travel, we observed a greater increase in e-cycling compared to the decrease in conventional cycling and walking, resulting in an overall rise in active transport. However, despite these findings, we did not detect a significant increase in overall physical activity resulting from this increased active mobility. Conclusion Initiatives such as subsidies for e-bikes may align with both environmental and public health goals, as the subvention led to an increase in the bicycle mode share and an overall rise in active transport. However, to assess the impact on overall physical activity, additional research utilising more precise measurements is needed.

• Fosstveit, Sindre Herskedal; Lindberg, Kolbjørn Andreas; Bjørnsen, Thomas; Sibayan, Erlend E.; Fjeller, Joachim S. & Løvold, Sondre [Vis alle 10 forfattere av denne artikkelen] (2023). Associations between Power Training-Induced Changes in Body Composition and Physical Function in Older Men: A Pre-Test–Post-Test Experimental Study. International Journal of Environmental Research and Public Health (IJERPH). ISSN 1661-7827. 20(22). doi: 10.3390/ijerph20227070. Fulltekst i vitenarkiv Vis sammendrag

  It is well-established that cross-sectional measurements of poor body composition are associated with impaired physical function and that power training effectively enhances total lean mass and physical function in older adults. However, it is unclear if power training-induced changes in body composition are associated with improved physical function in older adults. Aim: The present study investigated associations between body composition and physical function cross-sectionally and with power training-induced changes in older men. Methods: Forty-nine older men (68 ± 5 yrs) completed a 10-week biweekly power training intervention. Body composition was measured using dual-energy X-ray absorptiometry. Physical function was assessed as a composite Z-score combining measures from Sit-to-stand power, Timed up-and-go time, and loaded and unloaded Stair-climbing time (15 steps). Linear and quadratic regression analyses were performed to assess associations between body composition and physical function. Results: At baseline, total (R2 = 0.11, p < 0.05) and percentage body fat (R2 = 0.15, p < 0.05) showed a non-linear relationship with physical function. The apex of the quadratic regression for body composition was 21.5% body fat. Furthermore, there was a non-linear relationship between changes in body fat percentage and physical function from pre- to post-intervention (R2 = 0.15, p < 0.05). Conclusion: The present study’s findings indicate that participants with a body composition of ~20% body fat displayed the highest level of physical function at baseline. Furthermore, despite small pre–post changes in body fat, the results indicate that those who either preserved their body fat percentage or experienced minor alterations observed the greatest improvements in physical function.

• Malnes, Lena; Berntsen, Sveinung; Kolle, Elin; Ivarsson, Andreas; Dyrstad, Sindre Mikal & Resaland, Geir Kåre [Vis alle 8 forfattere av denne artikkelen] (2023). School-based physical activity in relation to active travel – a cluster randomized controlled trial among adolescents enrolled in the school in motion study in Norway. International Journal of Behavioral Nutrition and Physical Activity. ISSN 1479-5868. 20(1). doi: 10.1186/s12966-023-01534-x. Fulltekst i vitenarkiv Vis sammendrag

  Background Active travel and school settings are considered ideal for promoting physical activity. However, previous research suggests limited effect of school-based interventions on overall physical activity levels among adolescents. The relationship between physical activity in different domains remains inconclusive. In this study, we examined the effects of adding two weekly hours of school-based physical activity on active travel rates. Method We analyzed data from 1370 pupils in the 9th-grade participating in the cluster RCT; the School In Motion (ScIM) project. Intervention schools (n = 19) implemented 120 min of class-scheduled physical activity and physical education, in addition to the normal 2 hours of weekly physical education in the control schools (n = 9), for 9 months. Active travel was defined as pupils who reported walking or cycling to school, while motorized travel was defined as pupils who commuted by bus or car, during the spring/summer half of the year (April–September), or autumn/winter (October–February). The participants were categorized based on their travel mode from pretest to posttest as; maintained active or motorized travel (“No change”), changing to active travel (motorized-active), or changing to motorized travel (active-motorized). Multilevel logistic regression was used to analyze the intervention effect on travel mode. Results During the intervention period, most participants maintained their travel habits. In total, 91% of pupils maintained their travel mode to school. Only 6% of pupils switched to motorized travel and 3% switched to active travel, with small variations according to season and trip direction. The intervention did not seem to influence the likelihood of changing travel mode. The odds ratios for changing travel habits in spring/summer season were from active to motorized travel 1.19 [95%CI: 0.53–2.15] and changing from motorized to active travel 1.18 [0.30–2.62], compared to the “No change” group. These findings were consistent to and from school, and for the autumn/winter season. Conclusion The extra school-based physical activity does not seem to affect rates of active travel among adolescents in the ScIM project.

• Mazzoni, Anne-Sophie; Bjørke, Ann Christin Helgesen; Stenling, Andreas; Börjeson, Sussanne; Sjövall, Katarina & Berntsen, Sveinung [Vis alle 8 forfattere av denne artikkelen] (2023). The Role of Long-Term Physical Activity in Relation to Cancer-Related Health Outcomes: A 12-Month Follow-up of the Phys-Can RCT. Integrative Cancer Therapies. ISSN 1534-7354. 22, s. 1–10. doi: 10.1177/15347354231178869. Fulltekst i vitenarkiv Vis sammendrag

  Purpose: While moderate-to-vigorous intensity physical activity (MVPA) is associated with various health improvements shortly after completion of exercise interventions, it remains unclear which health benefits can be expected when MVPA levels are maintained in the long term in cancer survivors. We aimed to assess the associations of (1) MVPA level at 12-month follow-up and (2) long-term MVPA patterns (from immediately post-intervention to 12-month follow-up) with different cancer-related health outcomes. Methods: In the Physical training and Cancer (Phys-Can) RCT, 577 participants diagnosed with breast (78%), prostate (19%), or colorectal (3%) cancer were randomized to 6 months of exercise during curative cancer treatment. Accelerometer-assessed physical activity and outcome data (ie, cancer-related fatigue, health-related quality of life [HRQoL], anxiety and depression, functioning in daily life, cardiorespiratory fitness, sedentary time and sleep) were collected immediately post-intervention and at 12-month follow-up. Based on the sample’s median of MVPA immediately post-intervention (65 minutes/day) and the changes between the 2 measurement points, 4 categories with different long-term MVPA patterns were created: High & Increasing, High & Decreasing, Low & Increasing, and Low & Decreasing. Multiple linear regression analyses were performed for the analyses. Results: A total of 353 participants were included in the analyses. At 12-month follow-up, a higher MVPA level was significantly associated with lower fatigue in 3 domains (general fatigue [β = −.33], physical fatigue [β = −.53] and reduced activity [β = −.37]), higher cardiorespiratory fitness (β = .34) and less sedentary time (β = −.35). For long-term MVPA patterns, compared to the participants in the “Low & Decreasing” category, those in the “High & Increasing” category reported significantly lower fatigue in 3 domains (general fatigue [β = −1.77], physical fatigue [β = −3.36] and reduced activity [β = −1.58]), higher HRQoL (β = 6.84) and had less sedentary time (β = −1.23). Conclusion: Our results suggest that long-term physical activity is essential for improving health outcomes post-intervention in cancer survivors. Cancer survivors, including those who reach recommended MVPA levels, should be encouraged to maintain or increase MVPA post-intervention for additional health benefits.

• Mazzoni, Anne-Sophie; Strandberg, Emelie; Börjeson, Sussanne; Sjövall, Katarina; Berntsen, Sveinung & Demmelmaier, Ingrid [Vis alle 7 forfattere av denne artikkelen] (2023). Reallocating sedentary time to physical activity: effects on fatigue and quality of life in patients with breast cancer in the Phys-Can project. Supportive Care in Cancer. ISSN 0941-4355. 31(2). doi: 10.1007/s00520-023-07614-9.
• Stavnsbo, Mette; Stenling, Andreas; Berntsen, Sveinung; Chinapaw, Mai J. M.; Hansen, Bjørge Hermann & Manios, Yannis [Vis alle 12 forfattere av denne artikkelen] (2023). Does an obesogenic family environment moderate the association between sports participation and body composition in children? The ENERGY project. Pediatric Obesity. ISSN 2047-6302. 18(7). doi: 10.1111/ijpo.13031. Fulltekst i vitenarkiv Vis sammendrag

  BackgroundPrevious research on the association between sports participation and body composition has shown mixed findings. The family home is considered one of the most influential environments on childhood obesity. Thus, the association between sports participation and body composition in children may be influenced by an obesogenic home environment.ObjectivesTo investigate if an obesogenic family environment moderates the association between sports participation and body composition in children.MethodsA total of 3999 children (54% girls; 11.6 ± 0.7 years) and their parent(s) were included from the ENERGY project. A composite obesogenic family environment risk score was created from 10 questionnaire items. Height, weight (to calculate body mass index), and waist circumference were obtained by trained researchers and used as indicators of body composition.ResultsThe composite risk score significantly moderated the association between sports participation and both waist circumference and body mass index. In children from families with moderate and high obesogenic risk, organized sports participation was significantly associated with smaller waist circumference (moderate risk: −0.29, 95% CI −0.45 to −0.14; high risk: −0.46, 95% CI −0.66 to −0.25) and lower body mass index (moderate risk: −0.10, 95% CI −0.16 to −0.04; high risk: −0.14, 95% CI −0.22 to −0.06), but not in children with a low obesogenic family risk score.ConclusionsEnrolling children in sports activities from an early age can be important for healthy weight maintenance, especially among children from obesogenic family environments.

• Ax, Anna-Karin; Husberg, Magnus; Johansson, Birgitta; Demmelmaier, Ingrid; Berntsen, Sveinung & Sjövall, Katarina [Vis alle 9 forfattere av denne artikkelen] (2023). Cost-effectiveness of different exercise intensities during oncological treatment in the Phys-Can RCT. Acta Oncologica. ISSN 0284-186X. 62(4), s. 414–421. doi: 10.1080/0284186X.2023.2200149.
• Western, Benedikte; Demmelmaier, Ingrid; Vistad, Ingvild; Hansen, Bjørge Hermann; Stenling, Andreas & Henriksen, Hege [Vis alle 9 forfattere av denne artikkelen] (2023). How many days of continuous physical activity monitoring reliably represent time in different intensities in cancer survivors. PLOS ONE. ISSN 1932-6203. 18(4). doi: 10.1371/journal.pone.0284881. Fulltekst i vitenarkiv
• Henriksson, Anna; Strandberg, Emelie; Stenling, Andreas; Mazzoni, Anne-Sophie; Sjövall, Katarina & Börjeson, Sussanne [Vis alle 10 forfattere av denne artikkelen] (2023). Does inflammation markers or treatment type moderate exercise intensity effects on changes in muscle strength in cancer survivors participating in a 6-month combined resistance- and endurance exercise program? Results from the Phys-Can trial. BMC sports science, medicine and rehabilitation. ISSN 2052-1847. 15. doi: 10.1186/s13102-023-00617-3. Fulltekst i vitenarkiv Vis sammendrag

  Background: Resistance exercise has a beneficial impact on physical function for patients receiving oncological treatment. However, there is an inter-individual variation in the response to exercise and the tolerability to high-intensity exercise. Identifying potential moderating factors, such as inflammation and treatment type, for changes in muscle strength is important to improve the effectiveness of exercise programs. Therefore, we aimed to investigate if inflammation and type of oncological treatment moderate the effects of exercise intensity (high vs. low-moderate) on muscular strength changes in patients with breast (BRCA) or prostate cancer (PRCA). Methods: Participants with BRCA (n = 286) and PRCA (n = 65) from the Physical training and Cancer study (Phys-Can) were included in the present study. Participants performed a combined resistance- and endurance exercise program during six months, at either high or low-moderate intensity. Separate regression models were estimated for each cancer type, with and without interaction terms. Moderators included in the models were treatment type (i.e., neo/adjuvant chemotherapy—yes/no for BRCA, adjuvant androgen deprivation therapy (ADT)—yes/no for PRCA)), and inflammation (interleukin 6 (IL6) and tumor necrosis factor-alpha (TNFα)) at follow-up. Results: For BRCA, neither IL6 (b = 2.469, 95% CI [− 7.614, 12.552]) nor TNFα (b = 0.036, 95% CI [− 6.345, 6.418]) levels moderated the effect of exercise intensity on muscle strength change. The same was observed for chemotherapy treatment (b = 4.893, 95% CI [− 2.938, 12.724]). Similarly, for PRCA, the effect of exercise intensity on muscle strength change was not moderated by IL6 (b = − 1.423, 95% CI [− 17.894, 15.048]) and TNFα (b = − 1.905, 95% CI [− 8.542, 4.732]) levels, nor by ADT (b = − 0.180, 95% CI [− 11.201, 10.841]). Conclusions: The effect of exercise intensity on muscle strength is not moderated by TNFα, IL6, neo/adjuvant chemotherapy, or ADT, and therefore cannot explain any intra-variation of training response regarding exercise intensity (e.g., strength gain) for BRCA or PRCA in this setting.

• Vikmoen, Olav; Wiestad, Tor Helge; Thormodsen, Inger; Nordin, Karin; Berntsen, Sveinung & Demmelmaier, Ingrid [Vis alle 8 forfattere av denne artikkelen] (2022). Effects of High and Low-To-Moderate Intensity Exercise During (Neo-) Adjuvant Chemotherapy on Muscle Cells, Cardiorespiratory Fitness, and Muscle Function in Women With Breast Cancer: Protocol for a Randomized Controlled Trial. JMIR Research Protocols. ISSN 1929-0748. 11(11). doi: 10.2196/40811.
• Skorstad, Mette; Vistad, Ingvild; Fegran, Liv; Berntsen, Sveinung & Johannessen, Berit (2022). Nurse-led consultations reinforced with eHealth technology: a qualitative study of the experiences of patients with gynecological cancer. BMC Nursing. ISSN 1472-6955. 21. doi: 10.1186/s12912-022-01104-9. Fulltekst i vitenarkiv
• Schauer, Tim; Henriksson, Anna; Strandberg, Emelie; Lindman, Henrik; Berntsen, Sveinung & Demmelmaier, Ingrid [Vis alle 9 forfattere av denne artikkelen] (2022). Pre-treatment levels of inflammatory markers and chemotherapy completion rates in patients with early-stage breast cancer. International Journal of Clinical Oncology. ISSN 1341-9625. doi: 10.1007/s10147-022-02255-0. Fulltekst i vitenarkiv Vis sammendrag

  Background Chemotherapy efcacy is largely dependent on treatment adherence, defned by the relative dose intensity (RDI). Identifcation of new modifable risk factors associated with low RDI might improve chemotherapy delivery. Here, we evaluated the association between low RDI and pre-chemotherapy factors, including patient- and treatment-related characteristics and markers of infammation. Methods This exploratory analysis assessed data from 267 patients with early-stage breast cancer scheduled to undergo (neo-)adjuvant chemotherapy included in the Physical training and Cancer (Phys-Can) trial. The association between low RDI, defned as<85%, patient-related (age, body mass index, co-morbid condition, body surface area) and treatment-related factors (cancer stage, receptor status, chemotherapy duration, chemotherapy dose, granulocyte colony-stimulating factor) was investigated. Analyses further included the association between RDI and pre-chemotherapy levels of interleukin (IL)-6, IL-8, IL-10, C-reactive protein (CRP) and Tumor Necrosis Factor-alpha (TNF-α) in 172 patients with available blood samples. Results An RDI of<85% occurred in 31 patients (12%). Univariable analysis revealed a signifcant association with a chemotherapy duration above 20 weeks (p<0.001), chemotherapy dose (p=0.006), pre-chemotherapy IL-8 (OR 1.61; 95% CI (1.01; 2.58); p=0.040) and TNF-α (OR 2.2 (1.17; 4.53); p=0.019). In multivariable analyses, infammatory cytokines were signifcant association with low RDI for IL-8 (OR: 1.65 [0.99; 2.69]; p=0.044) and TNF-α (OR 2.95 [1.41; 7.19]; p=0.007). Conclusions This exploratory analysis highlights the association of pre-chemotherapy IL-8 and TNF-α with low RDI of chemotherapy for breast cancer. IL-8 and TNF-α may therefore potentially help to identify patients at risk for experiencing dose reductions.

• Bjørke, Ann Christin Helgesen; Buffart, Laurien M.; Raastad, Truls; Demmelmaier, Ingrid; Stenling, Andreas & Nordin, Karin [Vis alle 7 forfattere av denne artikkelen] (2022). Exploring Moderators of the Effect of High vs. Low-to-Moderate Intensity Exercise on Cardiorespiratory Fitness During Breast Cancer Treatment – Analyses of a Subsample From the Phys-Can RCT. Frontiers in Sports and Active Living. ISSN 2624-9367. 4. doi: 10.3389/fspor.2022.902124. Fulltekst i vitenarkiv
• Brooke, Hannah L.; Mazzoni, Anne-Sophie; Buffart, Laurien M.; Berntsen, Sveinung; Nordin, Karin & Demmelmaier, Ingrid (2022). Patterns and determinants of adherence to resistance and endurance training during cancer treatment in the Phys-Can RCT. BMC sports science, medicine and rehabilitation. ISSN 2052-1847. 14. doi: 10.1186/s13102-022-00548-5. Fulltekst i vitenarkiv
• Ax, Anna-Karin; Husberg, Magnus; Johansson, Birgitta; Demmelmaier, Ingrid; Berntsen, Sveinung & Sjövall, Katarina [Vis alle 9 forfattere av denne artikkelen] (2022). Long-term resource utilisation and associated costs of exercise during (neo)adjuvant oncological treatment: the Phys-Can project. Acta Oncologica. ISSN 0284-186X. 61(7), s. 888–896. doi: 10.1080/0284186X.2022.2075238. Fulltekst i vitenarkiv Vis sammendrag

  Background: Exercise during oncological treatment is beneficial to patient health and can counteract the side effects of treatment. Knowledge of the societal costs associated with an exercise intervention, however, is limited. The aims of the present study were to evaluate the long-term resource utilisation and societal costs of an exercise intervention conducted during (neo)adjuvant oncological treatment in a randomised control trial (RCT) versus usual care (UC), and to compare high-intensity (HI) versus low-to-moderate intensity (LMI) exercise in the RCT. Methods: We used data from the Physical Training and Cancer (Phys-Can) project. In the RCT, 577 participants were randomised to HI or to LMI of combined endurance and resistance training for 6 months, during oncological treatment. The project also included 89 participants with UC in a longitudinal observational study. We measured at baseline and after 18 months. Resource utilisation and costs of the exercise intervention, health care, and productivity loss were compared using analyses of covariance (RCT vs. UC) and t test (HI vs. LMI). Results: Complete data were available for 619 participants (RCT HI: n ¼ 269, LMI: n ¼ 265, and UC: n ¼ 85). We found no difference in total societal costs between the exercise intervention groups in the RCT and UC. However, participants in the RCT had lower rates of disability pension days (p < .001), corresponding costs (p ¼ .001), and pharmacy costs (p ¼ .018) than the UC group. Nor did we find differences in resource utilisation or costs between HI and LMI exercise int the RCT. Conclusion: Our study showed no difference in total societal costs between the comprehensive exercise intervention and UC or between the exercise intensities. This suggests that exercise, with its welldocumented health benefits during oncological treatment, produces neither additional costs nor savings.

• Malnes, Lena Hansen; Haugen, Tommy; Hansen, Bjørge Hermann; Kolle, Elin & Berntsen, Sveinung (2022). Establishing the Convergent Validity of the Travel Habit Questions in the Health Behavior in School-Aged Children Questionnaire by Quantifying Active Travel in Norwegian Adolescents. Frontiers in Sports and Active Living. ISSN 2624-9367. 4. doi: 10.3389/fspor.2022.761723. Fulltekst i vitenarkiv Vis sammendrag

  Background: Active travel (cycling or walking to school) can be a substantial part of adolescents' daily physical activity. Research on transport activities primarily relies on self-reported indices of travel mode and travel time. However, many researchers do not report the psychometric properties of their instruments. The Health Behavior in School-aged Children (HBSC) questionnaire is a commonly used instrument, but the items in this questionnaire on travel habits have not yet been validated. The present study was conducted to investigate the convergent validity and agreement between the HBSC items and a travel diary on (1) transport mode to and from school and (2) travel time to school. Methods: The study sample consisted of 50 participants in the 9th grade (15 ± 0.3 years, 62% girls) from seven Norwegian schools. Outcome variables included transport mode and travel time derived from the HBSC items and a five-day travel diary. Convergent validity was assessed by evaluating Cohen's kappa for travel mode and the correlation coefficient (Spearman Rho) for travel time. Simple agreement calculations between the two measurement methods were also conducted. Results: The association between the HBSC questionnaire and the diary for travel mode to and from school was κ = 0.63 (P < 0.001) and κ = 0.77 (P < 0.001), respectively. The total agreement between the HBSC questionnaire and the diary for was 78%. However, the agreement was higher for walking (88%) and cycling (91%) than for motorized transport (67%). For travel time, the Spearman correlation coefficient was ρ = 0.60 (P < 0.001) between the HBSC questionnaire and the diary. The total agreement on travel time was 67%; however, active commuters (86%) seemed to more accurately estimated travel time than motorized commuters (55%). Conclusion: Although the overall agreement between the HBSC questionnaire and the diary for mode of transport was 78%, the HBSC questionnaire may underestimate the prevalence of motorized transport compared to walking and cycling.

• Lindberg, Kolbjørn Andreas; Lohne-Seiler, Hilde; Fosstveit, Sindre Herskedal; Sibayan, Erlend E.; Fjeller, Joachim S. & Løvold, Sondre [Vis alle 12 forfattere av denne artikkelen] (2022). Effectiveness of individualized training based on force–velocity profiling on physical function in older men. Scandinavian Journal of Medicine & Science in Sports. ISSN 0905-7188. 32(6), s. 1013–1025. doi: 10.1111/sms.14157. Fulltekst i vitenarkiv Vis sammendrag

  The study aimed to investigate the effectiveness of an individualized power training program based on force–velocity (FV) profiling on physical function, muscle morphology, and neuromuscular adaptations in older men. Forty-nine healthy men (68 ± 5 years) completed a 10-week training period to enhance muscular power. They were randomized to either a generic power training group (GPT) or an individualized power training group (IPT). Unlike generic training, individualized training was based on low- or high-resistance exercises, from an initial force–velocity profile. Lower-limb FV profile was measured in a pneumatic leg-press, and physical function was assessed as timed up-and-go time (TUG), sit-to-stand power, grip strength, and stair-climbing time (loaded [20kg] and unloaded). Vastus lateralis morphology was measured with ultrasonography. Rate of force development (RFD) and rate of myoelectric activity (RMA) were measured during an isometric knee extension. The GPT group improved loaded stair-climbing time (6.3 ± 3.8 vs. 2.3% ± 7.3%, p = 0.04) more than IPT. Both groups improved stair-climbing time, sit to stand, and leg press power, grip strength, muscle thickness, pennation angle, fascicle length, and RMA from baseline (p < 0.05). Only GPT increased loaded stair-climbing time and RFD (p < 0.05). An individualized power training program based on FV profiling did not improve physical function to a greater degree than generic power training. A generic power training approach combining both heavy and low loads might be advantageous through eliciting both force- and velocity-related neuromuscular adaptions with a concomitant increase in muscular power and physical function in older men.

• Henriksson, Anna; Johansson, Birgitta; Radu, Calin; Berntsen, Sveinung; Igelström, Helena & Nordin, Karin (2021). Is it safe to exercise during oncological treatment? A study of adverse events during endurance and resistance training–data from the Phys-Can study. Acta Oncologica. ISSN 0284-186X. 60(1), s. 96–105. doi: 10.1080/0284186X.2020.1851046. Fulltekst i vitenarkiv
• Vistad, Ingvild; Skorstad, Mette; Demmelmaier, Ingrid; Småstuen, Milada Cvancarova; Lindemann, Kristina Yvonne Kathe & Wisløff, Torbjørn [Vis alle 8 forfattere av denne artikkelen] (2021). Lifestyle and Empowerment Techniques in Survivorship of Gynaecologic Oncology (LETSGO study): A study protocol for a multicentre longitudinal interventional study using mobile health technology and biobanking. BMJ Open. ISSN 2044-6055. 11(7). doi: 10.1136/bmjopen-2021-050930. Fulltekst i vitenarkiv
• Solberg, Runar Barstad; Steene-Johannessen, Jostein; Fagerland, Morten; Anderssen, Sigmund Alfred; Berntsen, Sveinung & Resaland, Geir Kåre [Vis alle 9 forfattere av denne artikkelen] (2021). Aerobic fitness mediates the intervention effects of a school-based physical activity intervention on academic performance. The school in Motion study – A cluster randomized controlled trial. Preventive Medicine Reports. ISSN 2211-3355. 24. doi: 10.1016/j.pmedr.2021.101648. Fulltekst i vitenarkiv
• Mazzoni, Anne-Sophie; Brooke, Hannah L.; Berntsen, Sveinung; Nordin, Karin & Demmelmaier, Ingrid (2021). Effect of self-regulatory behaviour change techniques and predictors of physical activity maintenance in cancer survivors: a 12-month follow-up of the Phys-Can RCT. BMC Cancer. ISSN 1471-2407. 21(1), s. 1–12. doi: 10.1186/s12885-021-08996-x. Fulltekst i vitenarkiv
• Bjørnarå, Helga Birgit; Berntsen, Sveinung; te Velde, Saskia J.; Fyhri, Aslak; Isaksen, Ketil & Deforche, Benedicte [Vis alle 9 forfattere av denne artikkelen] (2021). The impact of weather conditions on everyday cycling with different bike types in parents of young children participating in the CARTOBIKE randomized controlled trial. International Journal of Sustainable Transportation. ISSN 1556-8318. doi: 10.1080/15568318.2021.1999538. Fulltekst i vitenarkiv Vis sammendrag

  Knowledge about how weather conditions affect travel behavior in different user groups and contexts is relevant for planners and policymakers to facilitate sustainable transportation systems. We aimed to assess the influence of day-to-day weather on cycling for transportation among parents of young children with access to different bike types (e-bike vs non e-bike) in a natural study setting over nine months. We hypothesized less impact of weather variability on cycling when using an e-bike compared with a non e-bike. A randomized, controlled trial was conducted in Southern Norway. The intervention group (n = 18) was in random order equipped with an e-bike with trailer for child transportation (n = 6), a cargo (longtail) bike (n = 6) and a traditional bike with trailer (n = 6), each for three months. These 18 participants reported cycling on 832 out of 3276 person-days (25%). We used dynamic structural equation modeling for intensive longitudinal data to examine the relations between daily weather conditions, bike type (e-bike vs traditional bike), and cycling (dichotomized daily at yes or no). Air temperature (positively) and wind speed (negatively) were both credible predictors of cycling, whereas the other predictors (precipitation in the morning (yes or no) and presence of snow (yes or no) were not. We added interaction terms between bike type and weather conditions, but none of the interaction terms had a credible effect on cycling. Thus, the relations between weather conditions and cycling were not moderated by bike type among parents of young children.

• Johansen, Bjørn Tore; Brynjulfsen, Trine; Seiler, Hilde Lohne; Torstveit, Monica Klungland & Berntsen, Sveinung (2021). Experiences of Older Adults Preparing for Their First Triathlon: "A Qualitative Study of the Participation in an Endurance Training Intervention. International Journal of Qualitative Studies on Health and Well-being. ISSN 1748-2623. 16(1). doi: 10.1080/17482631.2021.1872824. Fulltekst i vitenarkiv Vis sammendrag

  Purpose: The overall aim of the present study was to explore the experiences of older adult exercisers participating in an individualized training program lasting 3 months preparing for completing a triathlon competition. Methods: Fourteen older Norwegian adults (median age (interquartile range, IQR) for males (N=10) and females (N=4) were 70.0 (65.0-75.5) and 57.5 (56.3-62.5) years, respectively) participated in 3-month individualized training program comprising three weekly sessions of running, cycling, and swimming. Both field- and laboratory-based testing were conducted. The participants attended two sports nutrition and competitive psychology seminars focusing on triathlon competition. The participants were interviewed in depth in three different focus groups. Thematic analysis was utilized to analyze the findings. Results: Participants improved their performance in all field-based tests. After completion of the thematic data analysis the main finding and overarching theme of well-being and being fit emerged. Additionally, three main themes were identified: 1) motivation; 2) progress and coping; and 3) breaking barriers. Conclusion: Psychological well-being and satisfaction of being fit seem to be vital to participate in a triathlon competition. Promoting specific age-appropriate participation in sports activities can be an effective strategy for promoting a healthy lifestyle among the elderly. Keywords: Running; being fit; cycling; elderly; personalized training; sport participation; swimming; triathlon; well-being.

• Bjørnsen, Thomas; Wernbom, Mathias; Paulsen, Gøran; Markworth, James F.; Berntsen, Sveinung & D'Souza, Randall F. [Vis alle 8 forfattere av denne artikkelen] (2021). High-frequency blood flow-restricted resistance exercise results in acute and prolonged cellular stress more pronounced in type I than in type II fibers. Journal of applied physiology. ISSN 8750-7587. 131(2), s. 643–660. doi: 10.1152/japplphysiol.00115.2020. Vis sammendrag

  Myocellular stress with high-frequency blood flow-restricted resistance exercise (BFRRE) was investigated by measures of heat shock protein (HSP) responses, glycogen content, and inflammatory markers. Thirteen participants [age: 24 ± 2 yr (means ± SD), 9 males] completed two 5-day blocks of seven BFRRE sessions, separated by 10 days. Four sets of unilateral knee extensions to failure at 20% of one-repetition maximum (1RM) were performed. Muscle samples obtained before, 1 h after the first session in the first and second block (acute 1 and acute 2), after three sessions (day 4), during the “rest week,” and at 3 (post 3) and 10 days postintervention (post 10) were analyzed for HSP70, αB-crystallin, glycogen [periodic acid-Schiff (PAS) staining], mRNAs, miRNAs, and CD68+ (macrophages) and CD66b+ (neutrophils) cell numbers. αB-crystallin translocated from the cytosolic to the cytoskeletal fraction after acute 1 and acute 2 (P < 0.05) and immunostaining revealed larger responses in type I than in type II fibers (acute 1, 225 ± 184% vs. 92 ± 81%, respectively, P = 0.001). HSP70 was increased in the cytoskeletal fraction at day 4 and post 3, and immunostaining intensities were more elevated in type I than in type II fibers at day 4 (206 ± 84% vs. 72 ± 112%, respectively, P <0.001), during the rest week (98 ± 66% vs. 42 ± 79%, P < 0.001), and at post 3 (115 ± 82% vs. 28 ± 78%, P = 0.003). Glycogen content was reduced in both fiber types, but most pronounced in type I, which did not recover until the rest week (−15% to 29%, P ≤ 0.001). Intramuscular macrophage numbers were increased by ∼65% postintervention, but no changes were observed in muscle neutrophils. We conclude that high-frequency BFRRE with sets performed till failure stresses both fiber types, with type I fibers being most affected.

• Lindberg, Kolbjørn; Solberg, Paul; Rønnestad, Bent; Frank, Martin; Larsen, Tommy Mella & Abusdal, Gøran [Vis alle 11 forfattere av denne artikkelen] (2021). Should we individualize training based on force-velocity profiling to improve physical performance in athletes? Scandinavian Journal of Medicine & Science in Sports. ISSN 0905-7188. 31(12), s. 2198–2210. doi: 10.1111/sms.14044. Fulltekst i vitenarkiv Vis sammendrag

  The present study aimed to examine the effectiveness of an individualized training program based on force-velocity (FV) profiling on jumping, sprinting, strength, and power in athletes. Forty national level team sport athletes (20 ± 4years, 83 ± 13 kg) from ice-hockey, handball, and soccer completed a 10-week training intervention. A theoretical optimal squat jump (SJ)-FV-profile was calculated from SJ with five different loads (0, 20, 40, 60, and 80 kg). Based on their initial FV-profile, athletes were randomized to train toward, away, or irrespective (balanced training) of their initial theoretical optimal FV-profile. The training content was matched between groups in terms of set x repetitions but varied in relative loading to target the different aspects of the FV-profile. The athletes performed 10 and 30 m sprints, SJ and countermovement jump (CMJ), 1 repetition maximum (1RM) squat, and a leg-press power test before and after the intervention. There were no significant group differences for any of the performance measures. Trivial to small changes in 1RM squat (2.9%, 4.6%, and 6.5%), 10 m sprint time (1.0%, −0.9%, and −1.7%), 30 m sprint time (0.9%, −0.6%, and −0.4%), CMJ height (4.3%, 3.1%, and 5.7%), SJ height (4.8%, 3.7%, and 5.7%), and leg-press power (6.7%, 4.2%, and 2.9%) were observed in the groups training toward, away, or irrespective of their initial theoretical optimal FV-profile, respectively. Changes toward the optimal SJ-FV-profile were negatively correlated with changes in SJ height (r = −0.49, p < 0.001). Changes in SJ-power were positively related to changes in SJ-height (r = 0.88, p < 0.001) and CMJ-height (r = 0.32, p = 0.044), but unrelated to changes in 10 m (r = −0.02, p = 0.921) and 30 m sprint time (r = −0.01, p = 0.974). The results from this study do not support the efficacy of individualized training based on SJ-FV profiling.

• Strandberg, Emelie ; Bean, Christopher ; Vassbakk-Svindland, Karianne ; Brooke, Hannah L.; Sjövall, Katarina & Börjeson, Sussanne [Vis alle 9 forfattere av denne artikkelen] (2021). Who makes it all the way? Participants vs. decliners, and completers vs. drop-outs, in a 6-month exercise trial during cancer treatment. Results from the Phys-Can RCT. Supportive Care in Cancer. ISSN 0941-4355. 30, s. 1739–1748. doi: 10.1007/s00520-021-06576-0. Fulltekst i vitenarkiv
• Nunavath, Vimala; Johansen, Sahand; Johannessen, Tommy Sandtorv; Jiao, Lei; Hansen, Bjørge Hermann & Berntsen, Sveinung [Vis alle 7 forfattere av denne artikkelen] (2021). Deep Learning for Classifying Physical Activities from Accelerometer Data. Sensors. ISSN 1424-8220. 21(16). doi: 10.3390/s21165564. Fulltekst i vitenarkiv
• Bjørnsen, Thomas; Wernbom, Mathias; Paulsen, Gøran; Berntsen, Sveinung; Brankovic, Robert & Stålesen, Håkon [Vis alle 8 forfattere av denne artikkelen] (2021). Frequent blood flow restricted training not to failure and to failure induces similar gains in myonuclei and muscle mass. Scandinavian Journal of Medicine & Science in Sports. ISSN 0905-7188. 31(7), s. 1420–1439. doi: 10.1111/sms.13952. Fulltekst i vitenarkiv Vis sammendrag

  The purpose of the present study was to compare the effects of short-term high-frequency failure vs non-failure blood flow–restricted resistance exercise (BFRRE) on changes in satellite cells (SCs), myonuclei, muscle size, and strength. Seventeen untrained men performed four sets of BFRRE to failure (Failure) with one leg and not to failure (Non-failure; 30-15-15-15 repetitions) with the other leg using knee-extensions at 20% of one repetition maximum (1RM). Fourteen sessions were distributed over two 5-day blocks, separated by a 10-day rest period. Muscle samples obtained before, at mid-training, and 10-day post-intervention (Post10) were analyzed for muscle fiber area (MFA), myonuclei, and SC. Muscle size and echo intensity of m.rectus femoris (RF) and m.vastus lateralis (VL) were measured by ultrasonography, and knee extension strength with 1RM and maximal isometric contraction (MVC) up until Post24. Both protocols increased myonuclear numbers in type-1 (12%–17%) and type-2 fibers (20%–23%), and SC in type-1 (92%–134%) and type-2 fibers (23%–48%) at Post10 (p < 0.05). RF and VL size increased by 5%–10% in both legs at Post10 to Post24, whereas the MFA of type-1 fibers in Failure was decreased at Post10 (−10 ± 16%; p = 0.02). Echo intensity increased by ~20% in both legs during Block1 (p < 0.001) and was ~8 to 11% below baseline at Post24 (p = 0.001–0.002). MVC and 1RM decreased by 5%–10% after Block1, but increased in both legs by 6%–11% at Post24 (p < 0.05). In conclusion, both short-term high-frequency failure and non-failure BFRRE induced increases in SCs, in myonuclei content, muscle size, and strength, concomitant with decreased echo intensity. Intriguingly, the responses were delayed and peaked 10–24 days after the training intervention. Our findings may shed light on the mechanisms involved in resistance exercise-induced overreaching and supercompensation.

• Demmelmaier, Ingrid; Brooke, Hannah L.; Henriksson, Anna; Mazzoni, Anne-Sophie; Bjørke, Ann Christin Helgesen & Igelström, Helena [Vis alle 23 forfattere av denne artikkelen] (2021). Does exercise intensity matter for fatigue during (neo-)adjuvant cancer treatment? The Phys-Can randomized clinical trial. Scandinavian Journal of Medicine & Science in Sports. ISSN 0905-7188. 31(5), s. 1144–1159. doi: 10.1111/sms.13930. Fulltekst i vitenarkiv Vis sammendrag

  Exercise during cancer treatment improves cancer-related fatigue (CRF), but the importance of exercise intensity for CRF is unclear. We compared the effects of high- vs low-to-moderate-intensity exercise with or without additional behavior change support (BCS) on CRF in patients undergoing (neo-)adjuvant cancer treatment. This was a multicenter, 2x2 factorial design randomized controlled trial (Clinical Trials NCT02473003) in Sweden. Participants recently diagnosed with breast (n = 457), prostate (n = 97) or colorectal (n = 23) cancer undergoing (neo-)adjuvant treatment were randomized to high intensity (n = 144), low-to-moderate intensity (n = 144), high intensity with BCS (n = 144) or low-to-moderate intensity with BCS (n = 145). The 6-month exercise intervention included supervised resistance training and home-based endurance training. CRF was assessed by Multidimensional Fatigue Inventory (MFI, five subscales score range 4-20), and Functional Assessment of Chronic Illness Therapy-Fatigue scale (FACIT-F, score range 0-52). Multiple linear regression for main factorial effects was performed according to intention-to-treat, with post-intervention CRF as primary endpoint. Overall, 577 participants (mean age 58.7 years) were randomized. Participants randomized to high- vs low-to-moderate-intensity exercise had lower physical fatigue (MFI Physical Fatigue subscale; mean difference −1.05 [95% CI: −1.85, −0.25]), but the difference was not clinically important (ie <2). We found no differences in other CRF dimensions and no effect of additional BCS. There were few minor adverse events. For CRF, patients undergoing (neo-)adjuvant treatment for breast, prostate or colorectal cancer can safely exercise at high- or low-to-moderate intensity, according to their own preferences. Additional BCS does not provide extra benefit for CRF in supervised, well-controlled exercise interventions.

• Schauer, Tim; Mazzoni, Anne-Sophie; Henriksson, Anna; Demmelmaier, Ingrid; Berntsen, Sveinung & Raastad, Truls [Vis alle 9 forfattere av denne artikkelen] (2021). Exercise intensity and markers of inflammation during and after (neo-) adjuvant cancer treatment. Endocrine-Related Cancer. ISSN 1351-0088. 28(3), s. 191–201. doi: 10.1530/ERC-20-0507.
• Solberg, Runar Barstad; Steene-Johannessen, Jostein; Anderssen, Sigmund Alfred; Ekelund, Ulf; Säfvenbom, Reidar & Haugen, Tommy [Vis alle 11 forfattere av denne artikkelen] (2021). Effects of a school-based physical activity intervention on academic performance in 14-year old adolescents: a cluster randomized controlled trial – the School in Motion study. BMC Public Health. ISSN 1471-2458. 21. doi: 10.1186/s12889-021-10901-x. Fulltekst i vitenarkiv Vis sammendrag

  Background: School-based physical activity interventions evaluating the effect on academic performance usually includes children. We aimed to investigate the effect of a nine-month, school-based physical activity intervention titled School in Motion (ScIM) on academic performance in adolescents. Methods: Thirty secondary schools in Norway were cluster-randomized into three groups: the Physically active learning (PAL) group (n = 10), the Don’t worry – Be Happy (DWBH) group (n = 10) or control (n = 10). Target dose in both intervention groups was 120 min/week of additional PA during school hours. Parental consent was obtained from 2084 adolescent students (76%). Standardized national tests in reading and numeracy was conducted at baseline and at the end of the intervention. We used linear mixed model to test intervention effects. We found significant intervention effects in numeracy and reading among students in both interventions when compared with controls. Results: The mean difference in change in numeracy was 1.7 (95% CI: 0.9 to 2.5; Cohen’s d = 0.12) and 2.0 (95% CI: 1.4 to 2.7; Cohen’s d = 0.23) points in favour of students in the PAL and DWBH intervention, respectively. Similar results were found for reading, where the mean difference in change was 0.9 (95% CI 0.2 to 1.6; Cohen’s d = 0.06) and 1.1 (95% CI 0.3 to 1.9; Cohen’s d = 0.18) points in favour of students in the PAL and DWBH intervention, respectively. When conducting intention to treat analysis with imputed data the estimates were attenuated and some no longer significant. Conclusion: The ScIM study demonstrates that two different school-based PA interventions providing approximately 120 min of additional PA weekly over nine months, significantly improved numeracy and reading performance in 14-year old students compared with controls. However, the results should be interpreted with caution as the effect sizes reported were very small or small and the estimates were attenuated when conducting intention to treat analysis. Despite this, our results are still positive and suggest that PA interventions are viable models to increase academic performance among adolescents.

• Bjørnarå, Helga Birgit; Westergren, Thomas; Sejersted, Ellen; Torstveit, Monica Klungland; Hansen, Bjørge Hermann & Berntsen, Sveinung [Vis alle 7 forfattere av denne artikkelen] (2021). Does organized sports participation in childhood and adolescence positively influence health? A review of reviews. Preventive Medicine Reports. ISSN 2211-3355. 23. doi: 10.1016/j.pmedr.2021.101425. Fulltekst i vitenarkiv
• Mackintosh, Kelly A.; McNarry, Melitta A.; Berntsen, Sveinung; Steele, James; Sejersted, Ellen & Westergren, Thomas (2021). Physical activity and sedentary time in children and adolescents with asthma: A systematic review and meta‐analysis. Scandinavian Journal of Medicine & Science in Sports. ISSN 0905-7188. 31(6), s. 1183–1195. doi: 10.1111/sms.13937. Fulltekst i vitenarkiv
• Mazzoni, Anne-Sophie; Brooke, Hannah L; Berntsen, Sveinung; Nordin, Karin & Demmelmaier, Ingrid (2020). Exercise Adherence and Effect of Self-Regulatory Behavior Change Techniques in Patients Undergoing Curative Cancer Treatment: Secondary Analysis from the Phys-Can Randomized Controlled Trial. Integrative Cancer Therapies. ISSN 1534-7354. 19. doi: 10.1177/1534735420946834. Fulltekst i vitenarkiv
• Kolle, Elin; Solberg, Runar Barstad; Säfvenbom, Reidar; Dyrstad, Sindre Mikal; Berntsen, Sveinung & Resaland, Geir Kåre [Vis alle 10 forfattere av denne artikkelen] (2020). The effect of a school-based intervention on physical activity, cardiorespiratory fitness and muscle strength: the School in Motion cluster randomized trial. International Journal of Behavioral Nutrition and Physical Activity. ISSN 1479-5868. 17. doi: 10.1186/s12966-020-01060-0. Fulltekst i vitenarkiv Vis sammendrag

  Background: Physical activity (PA) declines throughout adolescence, therefore PA promotion during this period is important. We analyzed the effect of two school-based PA interventions on daily PA levels, cardiorespiratory fitness (CRF) and muscle strength among adolescents. Methods: For the nine-month School in Motion intervention study (ScIM), we cluster-randomized 30 Norwegian secondary schools (N = 2084, mean age [SD] = 14 [0.3] years) to one of three study arms. The physically active learning (PAL) intervention included 30 min physically active learning, 30 min PA and a 60 min physical education (PE) lesson per week. The Don’t worry-Be happy (DWBH) intervention included a 60 min PA lesson and a 60 min PE lesson per week, both tailored to promote friendships and wellbeing. Both intervention arms were designed to engage the adolescents in 120 min of PA per week in addition to recess and mandatory PE lessons. The control group continued as per usual, including the standard amount of mandatory PE. PA (main outcome) was assessed by accelerometers, CRF and muscle strength (secondary outcomes) were assessed by an intermittent running test and selected tests from the Eurofit test battery. Results: Daily PA and time spent in moderate- to vigorous-intensity PA (MVPA) decreased in all groups throughout the intervention. The mean difference in PA level and MVPA for participants in the PAL-intervention arm was 34.7 cpm (95% CI: 4.1, 65.3) and 4.7 min/day (95% CI: 0.6, 8.8) higher, respectively, compared to the control arm. There were no significant intervention effects on daily PA level, MVPA or time spent sedentary for adolescents in the DWBH-intervention arm. Adolescents in the PAL-intervention arm increased distance covered in the running test compared to controls (19.8 m, 95% CI: 10.4, 29.1), whilst a negative intervention effect was observed among adolescents in the DWBH-intervention arm (− 11.6 m, 95% CI: − 22.0, − 1.1). Conclusion: The PAL-intervention resulted in a significantly smaller decrease in daily PA level, time spent in MVPA, and increased CRF compared to controls. Our results indicate that a teacher-led intervention, including three unique intervention components, is effective in curbing the decline in PA observed across our cohort and improving CRF.

• Moa, Ivar Fossland; Berntsen, Sveinung & Lagestad, Pål Arild (2020). Cardiorespiratory fitness is associated with drop out from sport in Norwegian adolescents. A longitudinal study. Frontiers in Public Health. ISSN 2296-2565. 8, s. 1–6. doi: 10.3389/fpubh.2020.502307. Fulltekst i vitenarkiv
• Wiestad, Tor Helge; Raastad, Truls; Nordin, Karin; Igelström, Helena; Henriksson, Anna & Demmelmaier, Ingrid [Vis alle 7 forfattere av denne artikkelen] (2020). The Phys-Can observational study: adjuvant chemotherapy is associated with a reduction whereas physical activity level before start of treatment is associated with maintenance of maximal oxygen uptake in patients with cancer. BMC sports science, medicine and rehabilitation. ISSN 2052-1847. 12. doi: 10.1186/s13102-020-00205-9. Fulltekst i vitenarkiv Vis sammendrag

  Background: Adjuvant therapy may cause multiple sideeffects on long term health, including reduced cardiorespiratory fitness (CRF) in patients with breast cancer (1, 2). However, there is currently limited knowledge regarding the effect of different types of adjuvant cancer treatment on CRF in other cancer populations. The primary objective of the present study was to assess whether previously known correlates (age, diagnosis, initial CRF, physical activity level), type of adjuvant treatment and cancer-related fatigue were associated with changes in V˙O2max in patients with breast, prostate or colorectal cancer. Methods: Prospective study with two time points of assessment, 85 patients scheduled for adjuvant cancer treatment were included. Cardiorespiratory fitness was assessed by V˙O2max during a maximal incremental exercise test on a treadmill before start of adjuvant therapy and again six months later. Physical activity level was recorded with a physical activity monitor (Sense Wear™ Mini) at baseline as average minutes of moderate-to-vigorous intensity physical activity (MVPA) per day. Physical fatigue at baseline was reported using the Multidimensional Fatigue Inventory-20 questionaire. Results: In multivariate linear regression analysis, 30 min higher daily MVPA at baseline was associated with a 5% higher V˙O2max at six months follow up when adjusted for adjuvant treatment (P = 0.010). Patients receiving adjuvant chemotherapy had a mean decline in V˙O2max of 10% (− 19, − 1; 95% confidence interval) compared to patients receiving adjuvant endocrine treatment (P = 0.028). Adjuvant radiotherapy, fatigue, age and diagnosis were not significantly associated with changes in V˙O2max. Conclusion: The results of the present study indicate that adjuvant chemotherapy is associated with a subsequent reduction in V˙O2max in patients with cancer whereas MVPA before start of adjuvant treatment is positively associated with a higher V˙O2max after end of adjuvant treatment.

• Bjørnarå, Helga Birgit; Westergren, Thomas; Fegran, Liv; te Velde, Saskia J.; Fyhri, Aslak & Deforche, Benedicte [Vis alle 9 forfattere av denne artikkelen] (2020). Cumbersome but desirable — Breaking the code of everyday cycling. PLOS ONE. ISSN 1932-6203. 15(9), s. 1–20. doi: 10.1371/journal.pone.0239127. Fulltekst i vitenarkiv Vis sammendrag

  Introduction Cycling for transport could integrate physical activity (PA) into daily routines and potentially increase total PA levels. However, for parents with young children, most factors affecting transport mode choice tend to facilitate car use. Greater insight is necessary into reasons for (not) using sustainable transport modes in parents with young children. Therefore, the objective of this study was to explore the experiences, including motives, perceptions, attitudes, and norms, of parents of young children by using an e-bike, a longtail bike, and a traditional bike for everyday travel to the workplace, kindergarten, and the grocery store during the autumn, winter, and spring, in nine months. Methods Semistructured focus group interviews were conducted with 18 parents of young children residing in southern Norway. Parents were recruited through Facebook announcements and direct contact with kindergartens, selected organisations, and companies in the Kristiansand municipality. Data were analysed by systematic text condensation by using NVivo V.11. Results Participants’ experiences were summarised by three main themes: ‘cycling is cumbersome’, ‘cycling reflects the desirable me’, and ‘breaking the cycling code’. Time use, planning, logistics, wet and cold weather, long distances, and no cycling habit were frequently mentioned barriers, and the most notable facilitator was the children’s attitude towards cycling. In general, children loved to cycle and preferred cycling to driving. Additionally, the freedom and independence of cycling were emphasised and valued. Conclusion In challenging weather conditions, parents of young children may experience cycling as cumbersome but desirable, and bike access could increase the feasibility of daily cycling.

• Mildestvedt, Thomas; Hovland, Olav Johannes; Berntsen, Sveinung; Bere, Elling Tufte & Fegran, Liv (2020). Getting Physically Active by E-Bike : An Active Commuting Intervention Study. Physical Activity and Health (PAAH). 4(1), s. 120–129. doi: 10.5334/paah.63/. Fulltekst i vitenarkiv
• Stålesen, Jarle Hansen; Westergren, Thomas; Hansen, Bjørge Hermann & Berntsen, Sveinung (2020). A Mapping Review of Physical Activity Recordings Derived From Smartphone Accelerometers. Journal of Physical Activity and Health. ISSN 1543-3080. 17(11), s. 1184–1192. doi: 10.1123/jpah.2020-0041.
• Brynjulfsen, Trine; Demmelmaier, Ingrid; Berntsen, Sveinung; Foyn, Tonje Hellum; Andersen, Oddbjørn Klomsten & Stang, Julie [Vis alle 11 forfattere av denne artikkelen] (2020). Motivation for physical activity in adolescents with asthma. Journal of Asthma. ISSN 0277-0903. doi: 10.1080/02770903.2020.1778025. Fulltekst i vitenarkiv Vis sammendrag

  Objective: We explored motivation for physical activity (PA) and exercise in adolescents with asthma who entered and continued a 10-week play-based exercise intervention. Methods: Eighteen adolescents with asthma, aged 13–17 years, participated in a 10-week play- and interval-based indoor exercise intervention during winter and autumn months. Semi-structured focus group interviews were conducted in weeks 2 and 8, focusing on motivation for PA and exercise, as well as field observations of exercise sessions in weeks 2, 6, and 8. The first interview was analyzed separately from the second one and descriptive observational data were obtained using thematic analysis and self-determination theory as a framework. Results: In the first round of focus group interviews, participants (n = 18) described amotivation and motivation for PA within the following five themes: “teachers’ lack of asthma knowledge”, “embarrassment over asthma symptoms”, “not being able to keep pace with peers”, “seasonal challenges”, and “mastering fun physical activities”. Based on the second interview (n = 14) and descriptive observational data (n = 18), participants reported and revealed amotivation and motivation for PA within the following four themes: “understanding and relatedness”, “social support”, “competition”, and “mastering fun activities”. Conclusion: We conclude that play-based exercises designed for groups of adolescents with asthma can support motivation for PA and exercise and reduce social and asthma-specific barriers.

• Bjørke, Ann Christin Helgesen; Raastad, Truls & Berntsen, Sveinung (2020). Criteria for the determination of maximal oxygen uptake in patients newly diagnosed with cancer: Baseline data from the randomized controlled trial of physical training and cancer (Phys-Can). PLOS ONE. ISSN 1932-6203. 15(6). doi: 10.1371/journal.pone.0234507. Fulltekst i vitenarkiv Vis sammendrag

  Introduction: Maximal oxygen uptake () is a measure of cardiorespiratory fitness often used to monitor changes in fitness during and after treatment in cancer patients. There is, however, limited knowledge in how criteria verifying work for patients newly diagnosed with cancer. Therefore, the aim of this study was to describe the prevalence of fulfillment of typical criteria verifying and to investigate the associations between the criteria and the test leader’s evaluation whether a test was performed “to exhaustion”. An additional aim was to establish new cut-points within the associated criteria. Methods: From the Phys-Can randomized controlled trial, 535 patients (59 ±12 years) newly diagnosed with breast (79%), prostate (17%) or colorectal cancer (4%) performed an incremental test on a treadmill. The test was performed before starting (neo-)adjuvant treatment and an exercise intervention. Fulfillment of different cut-points within typical criteria verifying was described. The dependent key variables included in the initial bivariate analysis were achievement of a plateau, peak values for maximal heart rate, respiratory exchange ratio (RER), the patients’ rating of perceived exertion on Borg’s scale6-20 and peak breathing frequency (fR). A receiver operating characteristic analysis was performed to establish cut-points for variables associated with the test leader’s evaluation. Last, a cross-validation of the cut-points found in the receiver operating characteristic analysis was performed on a comparable sample of cancer patients (n = 80). Results: The criteria RERpeak (<0.001), Borg’s RPE (<0.001) and fR peak (p = 0.018) were associated with the test leader’s evaluation of whether a test was defined as “to exhaustion”. The cut-points that best predicted the test leader’s evaluation were RER ≥ 1.14, RPE ≥ 18 and fR ≥ 40. Maximal heart rate and plateau was not associated with the test leader’s evaluation. Conclusion: We recommend a focus on RER (in the range between ≥1.1 and ≥1.15) and RPE (≥17 or ≥18) in addition to the test leader’s evaluation. Additionally, a fR peak of ≥40 breaths/min may be a cut-point to help the test leader evaluate the degree of exhaustion. However, more research is needed to verify our findings, and to investigate how these criteria will work within a population that are undergoing or finished with cancer treatment.

• Nilsson, Mona Otrebski; Arving, Cecilia; Thormodsen, Inger; Assmus, Jörg; Berntsen, Sveinung & Nordin, Karin (2019). Moderate-to-vigorous intensity physical activity is associated with modified fatigue during and after cancer treatment. Supportive Care in Cancer. ISSN 0941-4355. doi: 10.1007/s00520-019-05176-3.
• Berntsen, Sveinung; Edvardsen, Elisabeth; Gerbi, Shlomi; Pollestad, Magnhild Louise & Anderssen, Sigmund Alfred (2019). Do obese children achieve maximal heart rate during treadmill running? Sports. ISSN 2075-4663. 7(1). doi: 10.3390/sports7010026. Fulltekst i vitenarkiv
• Johannessen, Berit; Syvertsen, Siri; Kersten, Christian & Berntsen, Sveinung (2019). Cancer-related fatigue: Patients’ experiences of an intervention at a green care rehabilitation farm. Complementary Therapies in Clinical Practice. ISSN 1744-3881. s. 1–7. doi: 10.1016/j.ctcp.2019.101062.
• Bjørke, Ann Christin Helgesen; Sweegers, Maike G.; Buffart, Laurien M.; Raastad, Truls; Nygren, Peter & Berntsen, Sveinung (2019). Which exercise prescriptions optimize V̇O2max during cancer treatment?—A systematic review and meta‐analysis. Scandinavian Journal of Medicine & Science in Sports. ISSN 0905-7188. 29(9), s. 1274–1287. doi: 10.1111/sms.13442. Fulltekst i vitenarkiv Vis sammendrag

  The aims of the present systematic review and meta‐analysis were to investigate the effect of exercise on maximal oxygen uptake (urn:x-wiley:09057188:media:sms13442:sms13442-math-0003) and to investigate whether exercise frequency, intensity, duration, and volume are associated with changes in urn:x-wiley:09057188:media:sms13442:sms13442-math-0004 among adult patients with cancer undergoing treatment. Medline and Embase through OvidSP were searched to identify randomized controlled trials. Two reviewers extracted data and assessed the risk of bias. The overall effect size and differences in effects for different intensities and frequencies were calculated on change scores and post‐intervention urn:x-wiley:09057188:media:sms13442:sms13442-math-0005 data, and the meta‐regression of exercise duration and volumes was analyzed using the Comprehensive Meta‐Analysis software. Fourteen randomized controlled trials were included in the systematic review, comprising 1332 patients with various cancer types receiving (neo‐)adjuvant chemo‐, radio‐, and/or hormone therapy. Exercise induced beneficial changes in urn:x-wiley:09057188:media:sms13442:sms13442-math-0006 compared to usual care (effect size = 0.46, 95% Confidence Interval = 0.23‐0.69). Longer session duration (P = 0.020), and weekly duration (P = 0.010), larger weekly volume (P < 0.001), and shorter intervention duration (P = 0.005) were significantly associated with more beneficial changes in urn:x-wiley:09057188:media:sms13442:sms13442-math-0007. No differences in effects between subgroups with respect to frequency and intensity were found. In conclusion, exercise has beneficial effects on urn:x-wiley:09057188:media:sms13442:sms13442-math-0008 in patients with cancer undergoing (neo‐)adjuvant treatment. As interventions with larger exercise volumes and longer session durations resulted in larger beneficial changes in urn:x-wiley:09057188:media:sms13442:sms13442-math-0009, exercise frequency, intensity, and duration should be considered carefully for sufficient exercise volume to induce changes in urn:x-wiley:09057188:media:sms13442:sms13442-math-0010 for this patient group.

• Mazzoni, Anne-Sophie; Carlsson, Maria; Berntsen, Sveinung; Nordin, Karin & Demmelmaier, Ingrid (2019). “Finding my own motivation” — A Mixed Methods Study of Exercise and Behaviour Change Support During Oncological Treatment. International Journal of Behavioral Medicine. ISSN 1070-5503. s. 1–13. doi: 10.1007/s12529-019-09809-z. Fulltekst i vitenarkiv
• Bjørnarå, Helga Birgit; Berntsen, Sveinung; te Velde, Saskia J.; Fyhri, Aslak; Deforche, Benedicte & Andersen, Lars Bo [Vis alle 7 forfattere av denne artikkelen] (2019). From cars to bikes - the effect of an intervention providing access to different bike types: A randomized controlled trial. PLOS ONE. ISSN 1932-6203. 14(7), s. 1–17. doi: 10.1371/journal.pone.0219304. Fulltekst i vitenarkiv Vis sammendrag

  Introduction We aimed to investigate whether providing parents with children in kindergarten with access to different bicycle types could influence (i) travel behavior and cycling amount, and (ii) intrinsic motivation for cycling and psychological constructs related to car use. Methods A randomized, controlled trial was conducted in Southern Norway from September 2017 to June 2018. In total 36 parents were recruited and randomly drawn into an intervention (n = 18) or control group (n = 18). The intervention group was in random order equipped with an e-bike with trailer (n = 6), a cargo (longtail) bike (n = 6) and a traditional bike with trailer (n = 6). Results At follow-up, more participants from the intervention group (vs. the control group) were classified as cyclists to the workplace (n = 7 (38.9%) vs. n = 1 (5.9%), p = 0.04), but not to the kindergarten (n = 6 (33.3%) vs. n = 2 (11.8%), p = 0.23) or to the grocery store (n = 2 (11.1%) vs. n = 0 (0%), p = 0.49). A significant (p = ≤0.05) increase in cycling frequency (0.1 to 2.0 days/week) from baseline to follow-up was found in the intervention group for all destinations and seasons, except to the grocery store during winter (p = 0.16). A decrease in frequency of car driving (-0.2 to -1.7 days/week) was found to be apparent in terms of travelling to the workplace and the kindergarten for all seasons, yet not to the grocery store for any season (p = 0.15–0.49). The intervention group (vs. the control group) reported significantly higher “intrinsic regulation” for cycling (p = 0.01) at follow-up. Conclusion Access to different bike types for parents with children attending kindergarten resulted in overall increased cycling, decreased car use and higher intrinsic motivation for cycling. E-bikes obtained the greatest cycling amount in total, with the smallest sample variability. Hence, providing parents with children in kindergarten with access to e-bikes might result in increased and sustained cycling, also during the winter season.

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• Feron, Jack; Rahman, F.; Fosstveit, Sindre Herskedal; Joyce, K; Giliani, A & Lohne-Seiler, Hilde [Vis alle 10 forfattere av denne artikkelen] (2023). DETERMINANTS OF RESTING CEREBRAL BLOOD FLOW AND ARTERIAL TRANSIT TIME IN HEALTHY OLDER ADULTS.
• Mazzoni, Anne-Sophie; Börjeson, Sussanne; Sjövall, Katarina; Berntsen, Sveinung & Nordin, Karin (2023). The role of long-term physical activity in relation to cancer-related health outcomes: a 12-month follow-up of an exercise intervention .
• Mazzoni, Anne-Sophie; Strandberg, Emelie; Börjeson, Susanne; Sjövall, Katarina; Berntsen, Sveinung & Demmelmaier, Ingrid [Vis alle 7 forfattere av denne artikkelen] (2023). Reallocating sedentary time to physical activity may have beneficial effects on fatigue in patients with breast cancer: findings from the Phys-Can project .
• Henriksson, Anna; Stenling, Andreas; Mazzoni, Anne-Sophie; Sjövall, Katarina; Börjeson, Sussanne & Buffart, Laurien M [Vis alle 10 forfattere av denne artikkelen] (2023). Exercise adherence trajectory during chemotherapy treatment in patients with breast cancer- Results from the Phys-Can study .
• Malnes, Lena; Berntsen, Sveinung; Kolle, Elin; Ivarsson, Andreas & Dyrstad, Sindre Mikal (2023). School-based physical activity in relation to active travel among adolescents .
• Western, Benedikte; Ivarsson, Andreas; Demmelmaier, Ingrid; Vistad, Ingvild; Berntsen, Sveinung & Buffart, Laurien M. (2023). SUGGESTED TARGETS FOR IMPROVING EXERCISE INTERVENTION COMPLETION IN CANCER PATIENTS – AN INDIVIDUAL PATIENT DATA META-ANALYSIS FROM THE POLARIS STUDY.
• Fosstveit, Sindre Herskedal; Lohne-Seiler, Hilde; Feron, Jack; Lucas, Samuel J.E. & Berntsen, Sveinung (2023). HOW DOES OLDER ADULTS’ FITNESS LEVEL IMPACT THE ASSOCIATIONS BETWEEN BORGS RPE SCALE AND PHYSIOLOGICAL MEASURES OF EXERCISE INTENSITY?
• Wiestad, Tor Helge; Vikmoen, Olav; Ranes, Maria; Thormodsen, Inger; Fluge, Øystein & Mella, Olav [Vis alle 9 forfattere av denne artikkelen] (2023). EFFECTS OF HIGH VS. MODERATE INTENSITY COMBINED STRENGTH AND ENDURANCE TRAINING DURING CHEMOTHERAPY ON CARDIORESPIRATORY FITNESS, MUSCLE STRENGTH AND ENDURANCE IN WOMEN WITH BREAST CANCER.
• Vikmoen, Olav; Strandberg, Emelie ; Demmelmaier, Ingrid; Berntsen, Sveinung; Nordin, Karin & Raastad, Truls (2023). EFFECTS OF HEAVY-LOAD STRENGTH TRAINING DURING (NEO-)ADJUVANT CHEMOTHERAPY ON CARDIORESPIRATORY FITNESS, MITOCHONDRIAL ENZYMES AND CAPILLARIES IN WOMEN WITH BREAST CANCER.
• Spencer, Matthew; Aasland, Erik; Hansen, Bjørge Hermann & Berntsen, Sveinung (2023). Hva vil du lese om i Vitensporten? . Fædrelandsvennen. ISSN 0805-3790.
• Feron, Jack; Rahman, F.; Fosstveit, Sindre Herskedal; Joyce, Kelsey; Gilani, Ahmed & Seiler, Hilde Lohne [Vis alle 10 forfattere av denne artikkelen] (2023). Determinants of resting cerebral blood flow and arterial transit time in healthy older adults.
• Fosstveit, Sindre Herskedal; Feron, Jack; Lucas, Samuel J.E.; Seiler, Hilde Lohne & Berntsen, Sveinung (2023). How does older adults’ fitness level impact the associations between Borg's RPE scale and physiological measures of exercise intensity? .
• Fosstveit, Sindre Herskedal; Lindberg, Kolbjørn Andreas; Bjørnsen, Thomas; Sibayan, Erlend E.; Fjeller, Joachim S. & Løvold, Sondre [Vis alle 10 forfattere av denne artikkelen] (2022). Associations between power training-induced changes in body composition and physical function in older men: a pretest-posttest experimental study. .
• Lohne-Seiler, Hilde; Lindberg, Kolbjørn Andreas; Fosstveit, Sindre Herskedal; Sibayan, Erlend E.; Fjeller, Joachim S. & Løvold, Sondre [Vis alle 11 forfattere av denne artikkelen] (2022). Physical function and health-related quality of life in older men after 10-weeks power training – any associations?
• Berntsen, Sveinung (2022). Penger til fysisk aktivitet kan lønne seg . lokalavisen fedrelandsvennen.
• Bjørnsen, Thomas & Berntsen, Sveinung (2022). Så lite skal til for å bli sterkere. lokalavisen fedrelandsvennen.
• Bjørnsen, Thomas; Hody, Stephanie; Raastad, Truls; Paulsen, Gøran; Wernbom, Mathias & Vårvik, Fredrik Tonstad [Vis alle 8 forfattere av denne artikkelen] (2022). High-Frequency Blood Flow Restricted Resistance Exercise To Failure Induces Higher Cellular Stress In Muscle Fibres Than A Non-Failure Protocol .
• Berntsen, Sveinung (2022). Esport - et verktøy for læring og dannelse.
• Berntsen, Sveinung (2022). Trening ved kreftsykdom, viktigere enn tradisjonell behandling?
• Fosstveit, Sindre Herskedal; Lindberg, Kolbjørn Andreas; Bjørnsen, Thomas; Vårvik, Fredrik Tonstad; Berntsen, Sveinung & Seiler, Hilde Lohne (2022). Associations between power training-induced changes in body composition and physical function in older men: a pretest-posttest experimental study.
• Berntsen, Sveinung; Demmelmaier, Ingrid & Vistad, Ingvild (2022). Sufficiently active based on what?
• Berntsen, Sveinung & Torstveit, Monica Klungland (2021). Ser til Island for å forbedre den norske idrettsmodellen . [Avis]. Aftenposten.
• Berntsen, Sveinung (2021). Kreft og trening: Gode gevinster . Sunnmørsposten. ISSN 1503-9056.
• Breivik, Gunnar & Berntsen, Sveinung (2021). Dette er Vitensporten . Adresseavisen. ISSN 0805-3804.
• Berntsen, Sveinung (2021). Kreft og trening: Gode gevinster . Adresseavisen. ISSN 0805-3804.
• Berntsen, Sveinung (2021). Kreft og trening: Gode gevinster . Romsdals Budstikke.. ISSN 0806-5160.
• Berntsen, Sveinung (2021). Kreft og trening: Gode gevinster . Folkebladet.no.
• Andersen, Rune & Berntsen, Sveinung (2021). E-sport, mer enn gaming . Folkebladet.no.
• Breivik, Gunnar & Berntsen, Sveinung (2021). Dette er Vitensporten . Folkebladet.no.
• Berntsen, Sveinung (2021). Fysisk aktivitet og trening under kreftbehandling: Hva, hvordan og hvorfor?
• Berntsen, Sveinung (2021). Fysisk aktivitet og trening under kreftbehandling Hva, hvordan og hvorfor? Pfizer.
• Berntsen, Sveinung (2021). Bringer Universitetet i Agder til Risør . [Avis]. irisor.no.
• Berntsen, Sveinung (2021). Universitetet i Agder knytter seg tettere til lokal sport og idrett . [Internett]. idrett-anlegg.no.
• Berntsen, Sveinung (2021). Ser til Island for å forbedre den norske idrettsmodellen . [Avis]. fvn.no.
• Berntsen, Sveinung & Breivik, Gunnar (2021). Dette er Vitensporten . Fædrelandsvennen. ISSN 0805-3790.
• Berntsen, Sveinung (2021). Kreft og trening: Gode gevinster . Fædrelandsvennen. ISSN 0805-3790.
• Andersen, Rune & Berntsen, Sveinung (2021). E-sport, mer enn gaming. Fædrelandsvennen. ISSN 0805-3790.
• Fosstveit, Sindre Herskedal; Seiler, Hilde Lohne; Lindberg, Kolbjørn Andreas; Berntsen, Sveinung; Bjørnsen, Thomas & Vårvik, Fredrik Tonstad (2020). The effect of individualized power training based on the least developed capacity in force-velocity profiles of elderly men.
• Lohne-Seiler, Hilde; Torstveit, Monica Klungland; Johansen, Bjørn Tore; Pedersen, Andreas; Brynjulfsen, Trine & Byrkjedal, Per Thomas [Vis alle 7 forfattere av denne artikkelen] (2020). FROM UNTRAINED 55+ TO A TRIATHLETE. A PILOT STUDY.
• Berntsen, Sveinung (2020). BENEFITS OF EXERCISE DURING CANCER MANAGEMENT - WHAT COUNTS MOST, EXERCISE FREQUENCY, INTENSITY, DU- RATION, MODE OR IS IT ONLY A MATTER OF TOTAL AMOUNT OF PHYSICAL ACTIVITY?
• Mazzoni, A; Brooke, H; Berntsen, Sveinung; Nordin, Karin & Demmelmaier, Ingrid (2020). EXERCISE ADHERENCE AND EFFECT OF SELF-REGULATORY BEHAVIOUR CHANGE TECHNIQUES IN PATIENTS UNDERGOING CURATIVE CANCER TREATMENT: SECONDARY ANALYSIS FROM THE PHYS-CAN RANDOMISED CONTROLLED TRIAL.
• Berntsen, Sveinung (2020). Må en trene for å ha god helse?
• Berntsen, Sveinung (2020). Må en trene for å ha god helse?
• Berntsen, Sveinung (2020). Bekymret for skader . [Avis]. https://sornett.no/arkiv/201740.
• Fosstveit, Sindre H.; Lohne-Seiler, Hilde; Lindberg, Kolbjørn; Sibayan, Erlend; Fjeller, Joachim & Løvold, Sindre [Vis alle 10 forfattere av denne artikkelen] (2020). THE EFFECT OF INDIVIDUALIZED POWER-TRAINING BASED ON FORCE-VELOCITY PROFILING IN ELDERLY MEN.
• Bjørnarå, Helga Birgit; Berntsen, Sveinung; Te Velde, Saskia; Deforche, Benedicte; Fegran, Liv & Fyhri, Aslak [Vis alle 8 forfattere av denne artikkelen] (2019). E-bikes for family transportation: Project From Cars to Bikes.
• Westergren, Thomas; Stang, Julie; Stensrud, Trine; Andersen, Oddbjørn Klomsten; Sigdestad, Joakim Bordvik & Brynjulfsen, Trine [Vis alle 10 forfattere av denne artikkelen] (2019). Exercise adherence and psychological needs satisfaction in the PhysicaL activity and Asthma in Youth (PLAY) intervention.
• Borch, Kristin Benjaminsen; Andersen, Sigve; Oldervoll, Line Merethe & Berntsen, Sveinung (2019). Hva vet onkologer om fysisk aktivitet og kreft?
• Åvitsland, Andreas; Säfvenbom, Reidar; Tjomsland, Hege Eikeland; Kolle, Elin; Resaland, Geir Kåre & Berntsen, Sveinung [Vis alle 9 forfattere av denne artikkelen] (2019). A new approach to school time physical activity: The "Don't worry, be happy" intervention model.
• Kolle, Elin; Steene-Johannessen, Jostein; Säfvenbom, Reidar; Anderssen, Sigmund Alfred; Grydeland, May & Ekelund, Ulf [Vis alle 17 forfattere av denne artikkelen] (2019). Hovedrapport: School in motion. Utdanningsdirektoratet.

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