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This study hypothesises that appropriately planned physical activity (PA) intervention for pupils performed in the secondary school setting and during compulsory school time results in healthier body weight management.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      A systematic review and meta-analysis was performed following Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, a protocol, and a PROSPERO trial registration (CRD4202347770). The intended study population was pupils (aged 10\u201319) of secondary schools without major nutritional deficiency or unstable health conditions. Data appraisal and summary data extraction were completed by two reviewers, with the main outcome of body mass index (BMI) (kg\/m\n                      <jats:sup>2<\/jats:sup>\n                      ).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      In total, 5945 articles were identified by the search strategy, with 23 studies and 9441 pupils (including 4654\u2009females and 4787\u2009males) eligible for analysis. PA intervention implemented in the secondary level school setting for at least 8\u2009weeks duration was found to have a random effect size of \u22120.12\u2009kg\/m\n                      <jats:sup>2<\/jats:sup>\n                      BMI (95%\u2009CI: \u22120.26 to 0.02) as compared with controls, with low statistical heterogeneity (I\n                      <jats:sup>2<\/jats:sup>\n                      =0%; p=0.60).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>PA intervention in secondary schools contributes to healthier body weight management for pupils in the ongoing global health crisis.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1136\/bmjph-2024-002181","type":"journal-article","created":{"date-parts":[[2025,8,11]],"date-time":"2025-08-11T02:36:31Z","timestamp":1754879791000},"page":"e002181","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Randomised controlled interventions on physical activity, diet or their dual approach to better public health and the links to body mass index in 10\u201319 years: a systematic review and meta-analysis"],"prefix":"10.1136","volume":"3","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-5330-1665","authenticated-orcid":false,"given":"Derrick R","family":"Tanous","sequence":"first","affiliation":[{"name":"Department of Sport Science, Leopold Franzens Universit\u00e4t f\u00fcr Innsbruck, Innsbruck, Austria"},{"name":"Department of Secondary Education, University College of Teacher Education Tyrol, Innsbruck, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gerhard","family":"Ruedl","sequence":"additional","affiliation":[{"name":"Department of Sport Science, Leopold Franzens Universit\u00e4t f\u00fcr Innsbruck, Innsbruck, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mohamad","family":"Motevalli","sequence":"additional","affiliation":[{"name":"Department of Sport Science, Leopold Franzens Universit\u00e4t f\u00fcr Innsbruck, Innsbruck, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Clemens","family":"Drenowatz","sequence":"additional","affiliation":[{"name":"Division of Sport, Physical Activity and Health, University of Education Upper Austria, Linz, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joel","family":"Craddock","sequence":"additional","affiliation":[{"name":"Department of Medical Indigenous and Health Sciences, University of Wollongong, Wollongong, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Markus","family":"Schauer","sequence":"additional","affiliation":[{"name":"Department of Sport Science, Leopold Franzens Universit\u00e4t f\u00fcr Innsbruck, Innsbruck, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Georg","family":"G\u00f6bel","sequence":"additional","affiliation":[{"name":"Institute of Medical Statistics and Informatics, Medical University of Innsbruck, Innsbruck, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Werner","family":"Kirschner","sequence":"additional","affiliation":[{"name":"Department of Sport Science, Leopold Franzens Universit\u00e4t f\u00fcr Innsbruck, Innsbruck, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thomas","family":"Rosemann","sequence":"additional","affiliation":[{"name":"Institute of Primary Care, University of Zurich, Zurich, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Katharina C","family":"Wirnitzer","sequence":"additional","affiliation":[{"name":"Department of Sport Science, Leopold Franzens Universit\u00e4t f\u00fcr Innsbruck, Innsbruck, Austria"},{"name":"Department of Secondary Education, University College of Teacher Education Tyrol, Innsbruck, Austria"},{"name":"Department of Pediatric Oncology and Hematology, Working Group Prevention, Integrative Medicine and Health Promotion, Otto-Heubner Centre for Paediatric and Adolescent Medicine (OHC), Charit\u00e9 \u2013 Universit\u00e4tsmedizin Berlin, Berlin, Germany"},{"name":"Charit\u00e9 Competence Center for Traditional and Integrative Medicine (CCCTIM), Charit\u00e9 - Universit\u00e4tsmedizin Berlin, Berlin, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2025,8,10]]},"reference":[{"key":"2026010703061945000_3.2.e002181.1","unstructured":"World Health Organization . 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