Exercise Training and Energy Expenditure following Weight Loss.

• Autores: Gary R. Hunter, Eric P. Plaisance, Gordon Fisher, William H. Neumeier, Stephen Carter
• Localización: Medicine & Science in Sports & exercise: Official Journal of the American College of Sports Medicine, ISSN 0195-9131, Vol. 47, Nº. 9, 2015, págs. 1950-1957
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • AB Purpose: This study aims to determine the effects of aerobic or resistance training on activity-related energy expenditure (AEE; kcal[middle dot]d-1) and physical activity index (activity-related time equivalent (ARTE)) following weight loss. It was hypothesized that weight loss without exercise training would be accompanied by decreases in AEE, ARTE, and nontraining physical activity energy expenditure (nonexercise activity thermogenesis (NEAT)) and that exercise training would prevent decreases in free-living energy expenditure. Methods: One hundred forty premenopausal women had an average weight loss of 25 lb during a diet (800 kcal[middle dot]d-1) of furnished food. One group aerobically trained 3 times per week (40 min[middle dot]d-1), another group resistance-trained 3 times per week (10 exercises/2 sets x 10 repetitions), and the third group did not exercise. Dual-energy x-ray absorptiometry was used to measure body composition, indirect calorimetry was used to measure resting energy expenditure (REE) and walking energy expenditure, and doubly labeled water was used to measure total energy expenditure (TEE). AEE, ARTE, and nontraining physical activity energy expenditure (NEAT) were calculated. Results: TEE, REE, and NEAT all decreased following weight loss for the no-exercise group, but not for aerobic and resistance trainers. Only REE decreased in the two exercise groups. Resistance trainers increased ARTE. HR and oxygen uptake while walking on the flat and up a grade were consistently related to TEE, AEE, NEAT, and ARTE. Conclusions: Exercise training prevents a decrease in energy expenditure, including free-living energy expenditure separate from exercise training, following weight loss. Resistance training increases physical activity, whereas economy/ease of walking is associated with increased TEE, AEE, NEAT, and ARTE.