Key result
High-intensity interval training significantly reduced body weight, fat mass, and fat percentage in adults with overweight or obesity, though BMI and waist circumference were not significantly changed.
Why the study?
The effects of high-intensity interval training on body fat indicators in overweight and obese adults were examined to clarify its impact on body composition.
Does high-intensity interval training improve body fat indicators in overweight and obese adults?
Meta-Analysis
Does high-intensity interval training improve body fat indicators in overweight and obese adults?
High-intensity interval training is an effective and time-efficient strategy for reducing body weight, fat mass, and fat percentage in overweight and obese adults.
Supports HIIT prescription for fat loss in overweight adults; strengthens Level 1 evidence for time-efficient body composition interventions.
Objective: To examine the effects of high-intensity interval training on body fat indicators in overweight and obese adults. Methods: Randomized trials were included in the systematic review. Direct measures (e.g. whole-body fat) and indirect measures (e.g. waist circumference) were examined. Results: From 1156 articles initially screened, 24 were included. The majority of studies were conducted, at least, for 10 weeks. High-intensity interval training elicited reductions in whole- body fat indicators. The meta-analytic models showed significant differences after high-intensity interval training intervention among body weight, fat mass and fat percentage. On the other hand, body mass index and waist circumference did not present significant results. Conclusions: High-intensity exercise training can induce body composition improvements in overweight and obese individuals. High-intensity interval training may be a time-efficient component of weight management programs.
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Vale et al. (2020) conducted a meta-analysis in Overweight or obesity. High-intensity interval training was evaluated on Body fat indicators (direct and indirect measures). High-intensity interval training significantly reduced body weight, fat mass, and fat percentage in adults with overweight or obesity, though BMI and waist circumference were not significantly changed.
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