{"doi":"10.3389/fphys.2025.1527171","title":"Impact of exercise video-guided bodyweight interval training on psychophysiological outcomes in inactive adults with obesity","abstract":"Purpose 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. Methods Fourteen adults (30.7 ± 10.3 yrs, BMI 35.5 ± 5.4 kg/m 2 ) 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 ( <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" id=\"m1\"><mml:mrow><mml:mover accent=\"true\"><mml:mi mathvariant=\"normal\">V</mml:mi><mml:mo>˙</mml:mo></mml:mover></mml:mrow></mml:math> O 2peak ), 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. Results Relative isometric muscular strength increased by 12.5% ( p = 0.02, dz 0.4) and absolute <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" id=\"m2\"><mml:mrow><mml:mover accent=\"true\"><mml:mi mathvariant=\"normal\">V</mml:mi><mml:mo>˙</mml:mo></mml:mover></mml:mrow></mml:math> O 2peak by 4.2% ( p = 0.03, dz = 0.2). WC reduced by 2.1% ( p &amp;lt; 0.001, dz = 0.2). Task self-efficacy was similar pre- to post-intervention ( p = 0.53, dz = 0.2), while scheduling self-efficacy was reduced ( p &amp;lt; 0.004, dz = 1.1). PACES scores were 9.6% higher week one compared to week six of BW-IT ( p = 0.003, dz = 0.6). No changes occurred in body composition or cardiometabolic blood markers. Conclusion 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.","journal":"Frontiers in Physiology","year":2025,"id":552231,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":1,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.8849,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2025-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1448409,"name":"Alyssa R. Bailly","orcid":"0000-0002-1800-3969","position":1,"is_corresponding":false},{"id":1448410,"name":"Kelsey Bourbeau","orcid":"0000-0003-3153-7620","position":2,"is_corresponding":false},{"id":1448411,"name":"Christine M. Mermier","orcid":"0000-0001-8779-1885","position":3,"is_corresponding":false},{"id":1304921,"name":"Anthony Campitelli","orcid":"0000-0001-9191-9263","position":4,"is_corresponding":false},{"id":1448412,"name":"Quint Berkemeier","orcid":"0000-0003-3774-2115","position":5,"is_corresponding":false},{"id":1448701,"name":"Jonathan Specht","orcid":null,"position":6,"is_corresponding":false},{"id":1448702,"name":"J. Maclean Smith","orcid":null,"position":7,"is_corresponding":false},{"id":1395768,"name":"Jeremy B. Ducharme","orcid":"0000-0003-1653-8721","position":8,"is_corresponding":false},{"id":1448413,"name":"Matthew Stork","orcid":"0000-0002-9600-9119","position":9,"is_corresponding":false},{"id":246591,"name":"Jonathan P. Little","orcid":"0000-0002-9796-2008","position":10,"is_corresponding":false},{"id":1448414,"name":"Len Kravitz","orcid":"0000-0002-7270-9348","position":11,"is_corresponding":false},{"id":1086411,"name":"Flávio de Castro Magalhães","orcid":"0000-0002-1963-982X","position":12,"is_corresponding":false},{"id":1448415,"name":"Ann L. Gibson","orcid":"0000-0002-2941-1992","position":13,"is_corresponding":false},{"id":1436027,"name":"Fabiano T. Amorim","orcid":"0000-0003-2936-4484","position":14,"is_corresponding":false},{"id":1448700,"name":"Gabriella F. Bellissimo","orcid":null,"position":0,"is_corresponding":true}],"reference_count":44,"raw_metadata":null,"created_at":"2026-07-19T02:54:33.203144Z","pmid":"40247925","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}