{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,8]],"date-time":"2025-05-08T04:12:18Z","timestamp":1746677538344,"version":"3.40.5"},"reference-count":30,"publisher":"Sociedade Brasileira de Atividade F\u00edsica e Sa\u00fade","license":[{"start":{"date-parts":[[2025,5,7]],"date-time":"2025-05-07T00:00:00Z","timestamp":1746576000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rev. Bras. Ativ. F\u00eds. Sa\u00fade"],"abstract":"<jats:p>Objective: To evaluate the effect of 12 weeks of the ActTeens program on physical activity (PA) practice at different intensities, health-related physical fitness, and cardiometabolic indicators in Brazilian adolescents. Methods: The sample comprised 55 adolescents (37.5% female; mean age 13.84 [0.62]years) from two secondary private schools were included and divided by simple randon allocation into intervention (IG = 31 students) or control group (CG = 24 students). This pilot study of the ActTeens Program was conducted during the COVID-19 pandemic restrictions and included three components: (1) structured PA sessions delivered within Physical Education, (2) self monitoring plus goal setting by a pedometer, and (3) healthy lifestyle guidance (mHealth). PA was assessed using Actigraph hip-worn accelerometer (model GT3X+), muscular fitness was mensured by 90-pushup, sit-to-stand, and Cardiorespiratory fitness was assessed using the 20-m PACER shuttle run test, following standardized procedures, as well as cardiometabolic profile indicators (glucose; blood pressure and waist circumference). Intragroup analyzes were performed using generalized estimating equations, and intergroup by ANCOVA using the intention-to-treat principle with adjustment for the covariates of age, maturation, sex, and baseline values. Results: Adolescents in the IG showed significant increase for moderate (mean difference: 11.2 minutes\/day; 95% CI: 2.9; 21.0) and moderate-to-vigorous (mean difference: 18.9 minutes\/day, 95% CI: 5.9; 32.1) PA in comparison to the CG. No effect of the intervention was observed in sencondary outcomes (physical fitness and cardiometabolic indicators). The IG presented a significant increase in muscular and cardiorespiratory fitness, and decreased blood pressure after 12 weeks of the intervention. Conclusion: The strategies used in the ActTeens intervention were effective to promote the increase in PA and improve physical fitness in these adolescents during the COVID-19 pandemic. <\/jats:p>","DOI":"10.12820\/rbafs.30e0380","type":"journal-article","created":{"date-parts":[[2025,5,7]],"date-time":"2025-05-07T16:57:47Z","timestamp":1746637067000},"page":"1-13","source":"Crossref","is-referenced-by-count":0,"title":["Effects of ActTeens intervention on physical activity and health indicators in Brazilian adolescents: a pilot study","Efeitos da interven\u00e7\u00e3o ActTeens sobre atividade f\u00edsica e indicadores de sa\u00fade em adolescentes brasileiros: um estudo piloto"],"prefix":"10.12820","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1593-4546","authenticated-orcid":false,"given":"Gessika Castilho dos","family":"Santos","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1955-4922","authenticated-orcid":false,"given":"Jadson Marcio da","family":"Silva","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7633-9719","authenticated-orcid":false,"given":"Renan Camargo","family":"Correa","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9804-616X","authenticated-orcid":false,"given":"Sarah","family":"Kennedy","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2083-4104","authenticated-orcid":false,"given":"Jeffer Eidi","family":"Sasaki","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7169-8034","authenticated-orcid":false,"given":"Aristides Miguel da Costa","family":"Machado-Rodrigues","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2931-943X","authenticated-orcid":false,"given":"Antonio","family":"Stabelini Neto","sequence":"additional","affiliation":[]}],"member":"5063","published-online":{"date-parts":[[2025,5,7]]},"reference":[{"key":"58980","unstructured":"World Health Organization - WHO. 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