Effects of the intensity of interval training on aerobic fitness, body composition and resting metabolic rate of women with overweight or obesity: A randomized trial

Author:

Andreato Leonardo Vidal12,Andrade Alexandro1,Keech Andrew3,da Silva Valmir4,Francisco Walker William4,Milani Felipe Tiburcio4,de Souza Genta Laura5,Branco Braulio Henrique Magnani456

Affiliation:

1. Sport and Exercise Psychology Laboratory (LAPE), Santa Catarina State University, Florianópolis, SC, Brazil

2. School of Health Sciences, University of Amazonas State, Manaus, AM, Brazil

3. School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia

4. Physical Education Department, University Center of Maringá, Maringá, PR, Brazil

5. Medicine Department, University Center of Maringá, Maringá, PR, Brazil

6. Graduate Program of Health Promotion, University Center of Maringá, Maringá, PR, Brazil

Abstract

BACKGROUND: Moderate-intensity interval training (MIIT) may be a viable exercise format for improving body composition, aerobic fitness, and health-related variables. OBJECTIVES: This randomized trial aimed to analyze the effect of MIIT or high-intensity interval training (HIIT) on aerobic fitness, body composition variables, and resting metabolic rate (RMR) in women with overweight or obesity. METHODS: 31 sedentary adult women with overweight or obesity performed 7 weeks × 3 weekly sessions of either HIIT or MIIT. Physical and physiological tests were applied before and after training. RESULTS: In both analyses (intention-to-treat and by adherence to the training), aerobic fitness showed a time effect (p= 0.041 and p= 0.015), but without differences between groups (p> 0.05). No group (HIIT vs. MIIT), time (pre vs. post), or interaction effects (group vs. time) were found for RMR, body composition markers (fat mass, body fat percentage, lean mass), or body mass index – BMI (p> 0.05). In addition, MIIT induced a relatively high drop-out rate. CONCLUSIONS: This study suggested that the short-term (7-weeks) interval exercise training was effective for increasing aerobic fitness, and moderate-intensity intervals were as effective as high-intensity intervals. However, neither training format was effective for changing RMR, body composition variables, or BMI of women with overweight or obesity. Clinical trial ID: RBR-9jd7b7.

Publisher

IOS Press

Subject

Physical Therapy, Sports Therapy and Rehabilitation,Orthopedics and Sports Medicine,Biophysics

Reference53 articles.

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3. Effect of physical inactivity on major non-communicable diseases worldwide: an analysis of burden of disease and life expectancy;Lee;Lancet,2012

4. American College of Sports Medicine Position Stand. Appropriate physical activity intervention strategies for weight loss and prevention of weight regain for adults;Donnelly;Med Sci Sports Exerc,2009

5. European Guidelines for Obesity Management in Adults;Yumuk;Obes Facts,2015

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