{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T07:30:47Z","timestamp":1775028647396,"version":"3.50.1"},"reference-count":68,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2024,2,20]],"date-time":"2024-02-20T00:00:00Z","timestamp":1708387200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Public Health"],"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>The \u201cSuper Quinas\u201d project evaluated the effectiveness of an intervention program to improve physical activity, aerobic fitness, sleep, and motor competence on children in primary school.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The experimental group (<jats:italic>n<\/jats:italic> =\u200919) enrolled in a 12-week intervention program (one more extra-curricular activity class of 60\u2009min per week) compared to the CG (<jats:italic>n<\/jats:italic> =\u200919), all aged 9\u201310\u2009years. Physical activity (PA) and sleep were measured by accelerometry, and aerobic fitness was measured by Children\u2019s Yo-Yo test (YYIR1C) during the 1st week (PRE), the 6th week (DUR), and the 12th week (POST) of the intervention program. Motor Competence in PRE and POST intervention was also assessed by the Motor Competence Assessment (MCA) instrument. Heart rate (HR, assessed using HR monitors), and enjoyment level were recorded during all intervention program classes. A linear mixed model analysis (i.e., within-subject analyses) was performed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Comparing the EG and CG in DUR and POST, the EG spent ~18\u2009min and\u2009~\u200934\u2009min more time in moderate to vigorous physical activity (MVPA) per day (<jats:italic>p<\/jats:italic>\u2009&amp;lt;\u20090.001); had ~44\u2009min and\u2009~\u2009203\u2009min less sedentary time per day (<jats:italic>p<\/jats:italic>\u2009&amp;lt;\u20090.001); performed more 44 and 128\u2009m in the Children\u2019s Yo-Yo test compared to CG (<jats:italic>p<\/jats:italic>\u2009&amp;lt;\u20090.001) and slept more 17 and 114\u2009min per night (<jats:italic>p<\/jats:italic>\u2009&amp;lt;\u20090.001). In POST motor competence was significantly better (27%) in the EG compared to CG (<jats:italic>p<\/jats:italic>\u2009&amp;lt;\u20090.001). The %HRmax during the extra-curricular classes ranged between 65 and 81% (i.e., light to moderate intensities), and the enjoyment between fun and great fun.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Our findings suggest that adding one more extra-curricular activity class of 60\u2009min per week for 12\u2009weeks effectively increased the levels of physical activity, aerobic fitness, sleep duration, and motor competence in children aged 9\u201310\u2009years.<\/jats:p><\/jats:sec>","DOI":"10.3389\/fpubh.2024.1365782","type":"journal-article","created":{"date-parts":[[2024,2,20]],"date-time":"2024-02-20T05:48:21Z","timestamp":1708408101000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":13,"title":["A school-based physical activity intervention in primary school: effects on physical activity, sleep, aerobic fitness, and motor 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