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This study examines the effects of a 15-minute PEx intervention on the levels of physical fitness and anthropometric indicators of overweight and obesity among rural school students. <jats:italic><jats:bold>Methods<\/jats:bold>:<\/jats:italic> A total of 245 school students (135 boys and 110 girls), aged between 11 and 17\u00a0years, were randomly allocated into intervention and comparator groups. The intervention lasted for 12\u00a0weeks, comprising 24 PEx sessions. Physical fitness was measured through cardiorespiratory fitness, muscular strength\/endurance, handgrip strength, lower limb power, flexibility, speed, and agility. The measured anthropometric indicators of overweight and obesity included body mass index, waist circumference, and the sum of subscapular and triceps skinfolds. <jats:italic><jats:bold>Results<\/jats:bold>:<\/jats:italic> Generalized estimating equations analysis, performed with an intention-to-treat approach, indicated significant group\u2009\u00d7\u2009time interaction (<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.05) for flexibility, muscular strength\/endurance, handgrip strength, cardiorespiratory fitness (only for boys), and waist circumference. For these 5 variables, there were no differences between groups at the baseline (<jats:italic>P<\/jats:italic>\u2009&gt;\u2009.05), and the intervention group showed significantly greater improvements compared with the comparator group at the postintervention time (<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.05). <jats:italic><jats:bold>Conclusion<\/jats:bold>:<\/jats:italic> An intervention program consisting of 15\u00a0minutes of PEx during PE classes, conducted twice a week for 12\u00a0weeks, improves cardiorespiratory fitness, flexibility (only for boys), muscular strength\/endurance, handgrip strength, body mass index (only for girls), and waist circumference of rural adolescent school students.<\/jats:p>","DOI":"10.1123\/jpah.2024-0720","type":"journal-article","created":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T13:18:52Z","timestamp":1743599932000},"page":"800-810","source":"Crossref","is-referenced-by-count":2,"title":["Effects of Implementing 15-Minute Physical Exercise Sessions During Physical Education Classes on Physical Fitness and Anthropometric Indicators in Rural Adolescents"],"prefix":"10.1123","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-0472-8946","authenticated-orcid":true,"given":"Rodrigo Zanetti","family":"da Rocha","sequence":"first","affiliation":[{"name":"School of Physical Education and Physiotherapy, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0027-3354","authenticated-orcid":true,"given":"Franci\u00e9le da Silva","family":"Ribeiro","sequence":"additional","affiliation":[{"name":"School of Physical Education and Physiotherapy, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2704-5252","authenticated-orcid":true,"given":"Igor Darlan Krause","family":"Romig","sequence":"additional","affiliation":[{"name":"School of Physical Education and Physiotherapy, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8033-8815","authenticated-orcid":true,"given":"Henrique de Oliveira","family":"Arrieira","sequence":"additional","affiliation":[{"name":"School of Physical Education and Physiotherapy, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0493-0195","authenticated-orcid":true,"given":"Gicele de Oliveira Karini","family":"da Cunha","sequence":"additional","affiliation":[{"name":"School of Physical Education and Physiotherapy, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8335-6947","authenticated-orcid":true,"given":"Anelise Reis","family":"Gaya","sequence":"additional","affiliation":[{"name":"School of Physical Education and Physiotherapy, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5749-1512","authenticated-orcid":true,"given":"Eraldo dos Santos","family":"Pinheiro","sequence":"additional","affiliation":[{"name":"School of Physical Education and Physiotherapy, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6275-0232","authenticated-orcid":true,"given":"Gabriel Gustavo","family":"Bergmann","sequence":"additional","affiliation":[{"name":"School of Physical Education and Physiotherapy, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"10113","key":"r1","series-title":"Lancet","doi-asserted-by":"publisher","first-page":"2627","DOI":"10.1016\/S0140-6736(17)32129-3","article-title":"Worldwide trends in body-mass index, underweight, overweight, and obesity from 1975 to 2016: a pooled analysis of 2416 population-based measurement studies in 128\u00b79 million children, adolescents, and adults","volume":"390","year":"2017","unstructured":"NCD Risk Factor Collaboration (NCD-RisC). 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