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Resistance training conserves fat-free mass and resting energy expenditure following weight loss

Hunter, Gary R., Byrne, Nuala M., Sirikul, Bovorn, Fernández, José R., Zuckerman, Paul A., Darnell, Betty E., & Gower, Barbara A. (2008) Resistance training conserves fat-free mass and resting energy expenditure following weight loss. Obesity : the Official Journal of the Obesity Society, 16(5), pp. 1045-1051.

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Abstract

Objective: To determine what effect diet-induced 12 kg weight loss in combination with exercise training has on body composition and resting energy expenditure (REE) in premenopausal African-American (AA) and European-American (EA) women.---

Methods and Procedures: This study was a longitudinal, randomized weight loss clinical intervention, with either aerobic (AT), resistance (RT), or no exercise training (NT). Forty-eight AA and forty-six EA premenopausal overweight (BMI between 27 and 30) women underwent weight loss to a BMI <25. Body composition (densitometry), REE (indirect calorimetry), maximal oxygen uptake (VO2max), and muscular strength (isometric elbow flexion) were evaluated when subjects were in energy balance.---

Results: AA women lost less fat-free mass (FFM, P 0.05) (47.0 4.6 to 46.9 5.0 kg) than EA women (46.4 4.9 to 45.2 4.6 kg). Regardless of race, RT maintained FFM (P 0.05) following weight loss (46.9 5.2 to 47.2 5.0 kg) whereas AT (45.4 4.2 to 44.4 4.1 kg) and NT (47.9 4.7 to 46.4 5.1 kg) decreased FFM (P 0.05). Both AT and NT decreased in REE with weight loss but RT did not. Significant time by group interactions (all P 0.05) for strength indicated that RT maintained strength and AT did not.---

Discussion: AA women lost less FFM than EA women during equivalent weight losses. However, following weight loss in both AA and EA, RT conserved FFM, REE, and strength fitness when compared to women who AT or did not train.

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ID Code: 18460
Item Type: Journal Article
Additional URLs:
Keywords: Resistance training, Body mass, Weight loss, Resting energy expenditure
DOI: 10.1038/oby.2008.38
ISSN: 1930-7381
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > HUMAN MOVEMENT AND SPORTS SCIENCE (110600)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > HUMAN MOVEMENT AND SPORTS SCIENCE (110600) > Exercise Physiology (110602)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Schools > School of Exercise & Nutrition Sciences
Deposited On: 14 Apr 2009 16:00
Last Modified: 29 Feb 2012 23:50

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