Impact of exercise video-guided bodyweight interval training on psychophysiological outcomes in inactive adults with obesity

Impact of exercise video-guided bodyweight interval training on psychophysiological outcomes in inactive adults with obesity

PurposeDetermine 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.MethodsFourteen adults (30.7 ± 10.3 yrs, BMI 35.5 ± 5.4 kg/m2) participated in this s...

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Main Authors: Gabriella F. Bellissimo, Alyssa Bailly, Kelsey Bourbeau, Christine Mermier, Anthony Campitelli, Quint Berkemeier, Jonathan Specht, Jessica Smith, Jeremy Ducharme, Matthew J. Stork, Jonathan P. Little, Len Kravitz, Flávio de Castro Magalhães, Ann Gibson, Fabiano Amorim
Format: Article
Language:English
Published: Frontiers Media S.A. 2025-04-01
Series:Frontiers in Physiology
Subjects:
bodyweight exercise
interval training
obesity
cardiorespiratory fitness
muscular strength
enjoyment
Online Access:https://www.frontiersin.org/articles/10.3389/fphys.2025.1527171/full
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Summary:PurposeDetermine 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.MethodsFourteen adults (30.7 ± 10.3 yrs, BMI 35.5 ± 5.4 kg/m2) 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˙O2peak), 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.ResultsRelative isometric muscular strength increased by 12.5% (p = 0.02, dz 0.4) and absolute V˙O2peak by 4.2% (p = 0.03, dz = 0.2). WC reduced by 2.1% (p < 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 < 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.ConclusionIn 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.
ISSN:1664-042X

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