A Systematic Review of School-based Physical Activity and Sedentary Behaviour Interventions Among Older Adolescents
1University of Helsinki, Department of Social Research, Finland
2VU University medical center, EMGO Institute for Health and care Research, Department of Public and Occupational Health, Netherlands
3Newcastle University, Institute of Health and Society, United Kingdom
4University of Cambridge, Primary Care Unit, United Kingdom5UKK Institute for Health Promotion & The National Institute of Health and Welfare, Finland
Background: Earlier reviews on school-based physical activity (PA) and sedentary behaviour (SB) interventions among adolescents have not characterised intervention content in sufficient detail to draw conclusions about the effective ingredients. This systematic review evaluates 1) the effectiveness of school-based interventions for PA and SB, and 2) whether content (i.e., behaviour change techniques, BCTs) influences intervention effectiveness. Methods: Five databases were searched. Two researchers independently screened publications to check eligibility, assessed risk of bias, and coded intervention content using BCT Taxonomy v1. Results: Ten studies were included. Six out of 10 studies reported significant increases in PA and two out of 4 reported reductions in SB. Effects were generally small and short-term. Interventions effective in increasing PA included BCTs related to self-regulation, e.g, goal setting and self-monitoring. Discussion: School-based interventions can increase PA in the short term, and use of self-regulatory BCTs seems promising. Researchers need to improve the quality of intervention descriptions to be able to identify which BCTs were actually implemented.