{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,24]],"date-time":"2025-11-24T07:17:05Z","timestamp":1763968625614,"version":"3.41.2"},"reference-count":45,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2025,4,3]],"date-time":"2025-04-03T00:00:00Z","timestamp":1743638400000},"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. Physiol."],"abstract":"Purpose<\/jats:title>Determine the impact of a 6-week YouTube-instructed bodyweight interval training (BW-IT) program on cardiometabolic health, muscular strength, and factors related to exercise adherence in adults with obesity.<\/jats:p><\/jats:sec>Methods<\/jats:title>Fourteen adults (30.7 \u00b1 10.3 yrs, BMI 35.5 \u00b1 5.4 kg\/m2<\/jats:sup>) participated in this study. The BW-IT program progressed bi-weekly from a 1:3 to 1:1 work-to-rest ratio, using maximum effort intervals of high knees, squat jumps, scissor jacks, jumping lunges, and burpees. Pre- and post-intervention measures included peak oxygen consumption (V<\/mml:mi>\u02d9<\/mml:mo><\/mml:mover><\/mml:mrow><\/mml:math><\/jats:inline-formula>O2peak<\/jats:sub>), relative quadriceps isometric muscular strength, waist circumference (WC), body composition via bioelectrical impedance, and cardiometabolic blood markers (blood glucose, insulin, lipid panel, and C-reactive protein). Self-efficacy (task and scheduling) and physical activity enjoyment (PACES) were also assessed.<\/jats:p><\/jats:sec>Results<\/jats:title>Relative isometric muscular strength increased by 12.5% (p<\/jats:italic> = 0.02, dz 0.4) and absolute V<\/mml:mi>\u02d9<\/mml:mo><\/mml:mover><\/mml:mrow><\/mml:math><\/jats:inline-formula>O2peak<\/jats:sub> by 4.2% (p<\/jats:italic> = 0.03, dz<\/jats:italic> = 0.2). WC reduced by 2.1% (p<\/jats:italic> &lt; 0.001, dz<\/jats:italic> = 0.2). Task self-efficacy was similar pre- to post-intervention (p<\/jats:italic> = 0.53, dz<\/jats:italic> = 0.2), while scheduling self-efficacy was reduced (p<\/jats:italic> &lt; 0.004, dz<\/jats:italic> = 1.1). PACES scores were 9.6% higher week one compared to week six of BW-IT (p<\/jats:italic> = 0.003, dz<\/jats:italic> = 0.6). No changes occurred in body composition or cardiometabolic blood markers.<\/jats:p><\/jats:sec>Conclusion<\/jats:title>In previously inactive adults with obesity, 18 sessions of YouTube-instructed bodyweight interval training elicited small to moderate effects on lower extremity muscular strength, cardiorespiratory fitness, and waist circumference. Future studies may benefit from longer interventions and adding a greater variety of calisthenics to determine interventions that improve physiological health and maintain or enhance factors associated with exercise adherence.<\/jats:p><\/jats:sec>","DOI":"10.3389\/fphys.2025.1527171","type":"journal-article","created":{"date-parts":[[2025,4,3]],"date-time":"2025-04-03T08:37:47Z","timestamp":1743669467000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Impact of exercise video-guided bodyweight interval training on psychophysiological outcomes in inactive adults with obesity"],"prefix":"10.3389","volume":"16","author":[{"given":"Gabriella F.","family":"Bellissimo","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alyssa","family":"Bailly","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kelsey","family":"Bourbeau","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christine","family":"Mermier","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anthony","family":"Campitelli","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Quint","family":"Berkemeier","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonathan","family":"Specht","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jessica","family":"Smith","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeremy","family":"Ducharme","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Matthew J.","family":"Stork","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonathan P.","family":"Little","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Len","family":"Kravitz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fl\u00e1vio","family":"de Castro Magalh\u00e3es","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ann","family":"Gibson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fabiano","family":"Amorim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2025,4,3]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"85","DOI":"10.15585\/mmwr.mm7204a1","article-title":"Prevalence of meeting aerobic, muscle-strengthening, and combined physical activity guidelines during leisure time among adults, by rural-urban classification and region\u2014United States, 2020","volume":"72","author":"Abildso","year":"2023","journal-title":"MMWR. 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