{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T20:24:23Z","timestamp":1789676663175,"version":"4.0.1"},"reference-count":55,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2023,9,20]],"date-time":"2023-09-20T00:00:00Z","timestamp":1695168000000},"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. Psychol."],"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>The main objective of the present study was to examine the effects of an intermittent teaching unit based on the use of activity wristbands and behavior modification strategies on high school students\u02bc perceptions of autonomy support, satisfaction of basic psychological needs, motivation toward Physical Education and physical activity, intention to be physically active, and habitual physical activity levels.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and methods<\/jats:title><jats:p>An initial sample of 353 high school students (final sample\u2009=\u2009175; 45.7% females; mean age\u2009=\u200913.3\u2009\u00b1\u20091.2\u2009years) from two public high schools were cluster-randomly assigned into the intermittent (IG, <jats:italic>n<\/jats:italic>\u2009=\u2009100) and control (CG, <jats:italic>n<\/jats:italic>\u2009=\u200975) groups. The IG performed an intermittent teaching unit twice a week for eight weeks. Specifically, the last 15\u2009min of each lesson were used. As the main strategy to promote the practice of regular physical activity, students wore an activity wristband the whole day during the intervention period. Additionally, other behavior modification strategies were also applied (e.g., educational counseling, physical activity goals or reminders). Regarding the CG, during the intervention period (i.e,, the eight weeks that took place the intermittent teaching unit) they also performed two Physical Education sessions, but without using activity wristbands or other behavior modification strategies. Before and after the intervention, as well as at the end of the follow-up period (six weeks), students\u2019 physical activity practice mediators and physical activity levels were measured by validated questionnaires.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The Multilevel Linear Model results showed that the IG students statistically significantly improved cognitive and procedural autonomy support from pre- to post-intervention (<jats:italic>p<\/jats:italic>\u2009&amp;lt;\u20090.05). They also statistically significantly improved autonomy and relatedness basic psychological needs, and autonomous motivation toward physical activity scores from post-intervention to follow-up (<jats:italic>p<\/jats:italic>\u2009&amp;lt;\u20090.05). Moreover, the results showed that the IG students statistically significantly improved habitual physical activity scores from pre- to post-intervention, and from post-intervention to follow-up (<jats:italic>p<\/jats:italic>\u2009&amp;lt;\u20090.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The intermittent teaching unit based on the use of activity wristbands and other behavior modification strategies was effective for improving students\u02bc autonomy support and habitual physical activity levels, but not the rest of physical activity practice mediators.<\/jats:p><\/jats:sec><jats:sec><jats:title>Clinical trial registration<\/jats:title><jats:p><jats:ext-link>https:\/\/register.clinicaltrials.gov\/<\/jats:ext-link>, ID: NCT05949463.<\/jats:p><\/jats:sec>","DOI":"10.3389\/fpsyg.2023.1228925","type":"journal-article","created":{"date-parts":[[2023,9,21]],"date-time":"2023-09-21T08:05:01Z","timestamp":1695283501000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":6,"title":["Effect of an activity wristband-based intermittent teaching unit in Physical Education on students\u02bc physical activity and its psychological mediators: a cluster-randomized controlled trial. School-fit study"],"prefix":"10.3389","volume":"14","author":[{"given":"Santiago","family":"Guijarro-Romero","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel","family":"Mayorga-Vega","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carolina","family":"Casado-Robles","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jes\u00fas","family":"Viciana","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2023,9,20]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"379","DOI":"10.1037\/0278-6133.27.3.379","article-title":"A taxonomy of behavior change techniques used in interventions","volume":"27","author":"Abraham","year":"2008","journal-title":"Health Psychol."},{"key":"ref2","doi-asserted-by":"publisher","first-page":"179","DOI":"10.1016\/0749-5978(91)90020-T","article-title":"The theory of planned behavior","volume":"50","author":"Ajzen","year":"1991","journal-title":"Organ. 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