{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,4]],"date-time":"2026-02-04T16:59:57Z","timestamp":1770224397430,"version":"3.49.0"},"reference-count":46,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2021,6,22]],"date-time":"2021-06-22T00:00:00Z","timestamp":1624320000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"ERASMUS+ SPORT program","award":["613324-EPP-1-2019-1-PT-SPO-SCP"],"award-info":[{"award-number":["613324-EPP-1-2019-1-PT-SPO-SCP"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sustainability"],"abstract":"<jats:p>Background: The present study investigates the role of different sources of social support in the relationship of BMI and PA in an international sample of children and adolescents. Methods: Data included 170,211 adolescents (51.5% female), aged 10\u201316 (M = 13.6, SD = 1.64) from 37 European countries\/regions and were retrieved from the 2013\/14 Health Behaviour in School-aged Children (HBSC) international database. Results: PA levels in adolescents are lower for girls, decrease with age, and are lower for overweight and obese adolescents compared to underweight and normal-weight adolescents. Peer support and teacher support significantly predict PA (ORpeer = 1.11; ORteacher = 0.97) and vigorous PA frequency (ORpeer = 1.13; ORteacher = 0.94). Family support only affected vigorous PA frequency (OR = 1.03). Family support had a moderating effect on PA in overweight (ORfamily*BMI(overweight) = 0.94) and obese (ORfamily*BMI(obese) = 0.90) adolescents. Peer support had a moderating effect on vigorous PA frequency in obese (ORpeer*BMI(obese) = 1.08) adolescents. Teacher support had a moderating effect on PA (ORteacher*BMI(normal) = 1.05; ORteacher*BMI(overweight) = 1.09) and vigorous PA frequency (ORteacher*BMI(normal) = 1.07; ORteacher*BMI(overweight) = 1.08) in normal-weight and overweight adolescents. Conclusion: Social support helps adolescents to be active. Especially for obese adolescents, support by and relations with peers are important to reach a significant amount of PA.<\/jats:p>","DOI":"10.3390\/su13136992","type":"journal-article","created":{"date-parts":[[2021,6,22]],"date-time":"2021-06-22T22:10:59Z","timestamp":1624399859000},"page":"6992","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Physical Activity and Body-Mass-Index: Do Family, Friends and Teachers Restrain the Risk for Physical Inactivity in Adolescents?"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9212-729X","authenticated-orcid":false,"given":"Denise","family":"Renninger","sequence":"first","affiliation":[{"name":"Department of Sport and Health Sciences, Technical University of Munich, 80992 Munich, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0372-041X","authenticated-orcid":false,"given":"David Joseph","family":"Sturm","sequence":"additional","affiliation":[{"name":"Department of Sport and Health Sciences, Technical University of Munich, 80992 Munich, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9850-7771","authenticated-orcid":false,"given":"Adilson","family":"Marques","sequence":"additional","affiliation":[{"name":"CIPER, Faculty of Human Kinetics, University of Lisbon, 1495-751 Cruz Quebrada, Portugal"},{"name":"ISAMB-Instituto de Sa\u00fade Ambiental, University of Lisbon, 1649-026 Lisbon, Portugal"}]},{"given":"Miguel","family":"Peralta","sequence":"additional","affiliation":[{"name":"CIPER, Faculty of Human Kinetics, University of Lisbon, 1495-751 Cruz Quebrada, Portugal"},{"name":"ISAMB-Instituto de Sa\u00fade Ambiental, University of Lisbon, 1649-026 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6633-3575","authenticated-orcid":false,"given":"Stevo","family":"Popovic","sequence":"additional","affiliation":[{"name":"Faculty for Sport and Physical Education, University of Montenegro, 81400 Niksic, Montenegro"},{"name":"Western Balkan Sport Innovation Lab, 81000 Podgorica, Montenegro"},{"name":"Montenegrin Sports Academy, 81000 Podgorica, Montenegro"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0654-9112","authenticated-orcid":false,"given":"Jovan","family":"Gardasevic","sequence":"additional","affiliation":[{"name":"Faculty for Sport and Physical Education, University of Montenegro, 81400 Niksic, Montenegro"},{"name":"Montenegrin Sports Academy, 81000 Podgorica, Montenegro"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4939-4982","authenticated-orcid":false,"given":"Bojan","family":"Masanovic","sequence":"additional","affiliation":[{"name":"Faculty for Sport and Physical Education, University of Montenegro, 81400 Niksic, Montenegro"},{"name":"Montenegrin Sports Academy, 81000 Podgorica, Montenegro"},{"name":"Montenegrosport, 81000 Podgorica, Montenegro"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6781-1295","authenticated-orcid":false,"given":"Yolanda","family":"Demetriou","sequence":"additional","affiliation":[{"name":"Department of Sport and Health Sciences, Technical University of Munich, 80992 Munich, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2021,6,22]]},"reference":[{"key":"ref_1","unstructured":"WHO (2020). 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