Objective: The aim of this study was to investigate the impact of caloric restriction (CR) and resistance training (RT) on body composition, metabolic profile and physical capacity in dynapenic-obese postmenopausal women.
Methods: Thirty-eight dynapenic-obese postmenopausal (age, 62.6 ± 4.1 y) women were randomly assigned to one of four groups (1, CR; 2, RT; 3, CR + RT; and 4, control) for a 12-week intervention. The independent variables were body weight, fat mass, and lean body mass (using dual-energy x-ray absorptiometry), waist circumference, fasting lipids and glucose, resting systolic and diastolic blood pressure, and physical capacity (6-min walk, chair stand, and one-leg stand tests).
Results: Body weight, fat mass, and waist circumference decreased similarly in the CR and CR + RT groups (all P ≤ 0.05). However, only changes in the CR + RT group were significantly different from the control group (all P ≤ 0.05). Total cholesterol, triglycerides, and systolic and diastolic blood pressure significantly decreased in the CR group (all P ≤ 0.05); whereas total cholesterol, low-density lipoprotein cholesterol, and systolic blood pressure decreased in the CR + RT group (P ≤ 0.05). Physical capacity improved significantly in the RT and CR + RT groups (all P ≤ 0.05), with significant greater improvements in the RT group (P ≤ 0.05).
Conclusions: Our results suggest that CR with or without RT is effective in improving metabolic profile, whereas RT is effective in improving physical capacity. The combination of RT and CR may be particularly relevant in maximizing improvements in physical capacity in dynapenic-obese postmenopausal women.
From the 1Research Centre on Aging Health and Social Services Centre, Institute of Geriatrics, Sherbrooke University, Sherbrooke, Québec, Canada; 2Faculty of Physical Education and Sports, University of Sherbrooke,Sherbrooke, Québec, Canada; 3Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, Manitoba, Canada; and 4Health, Leisure & Human Performance Research Institute, Winnipeg, Manitoba, Canada.
Received November 1, 2011; revised and accepted December 29, 2011.
Funding: Martin Sénéchal and Isabelle J. Dionne are both supported by the Canadian Institute of Health Research (CIHR). Danielle R. Bouchard was supported by start-up funds from the University of Manitoba.
Financial disclosure/conflicts of interest: None reported.
Address correspondence to: Martin Brochu, PhD, Centre de recherche sur le vieillissement, Institut universitaire de gériatrie de Sherbrooke, 1036, rue Belvédère Sud, Sherbrooke, Québec, Canada, J1H 4C4. E-mail: Martin.Senechal@usherbrooke.ca