Aging Clinical Trial
Official title:
Independent and Combined Effects of Resistance Exercise Training and β-hydroxy β-methylbutyrate Plus Vitamin D on Body Composition and Skeletal Muscle Health
During middle-age, humans begin to lose muscle mass and strength. With increasing age the deterioration of muscle health is associated with a decline in quality of life and the loss of independence. β-hydroxy β-methylbutyrate (HMB) plus Vitamin D (VitD) have been proposed to increase skeletal muscle mass, contractile function and improve body composition but has yet to be evaluated in middle-aged women. The overall goal of this study is to determine the effects of HMB +VitD supplementation during 12 weeks of resistance exercise training or a non-exercise control on body composition, skeletal muscle size, and skeletal muscle function in middle-aged women.
To determine if HMB+VitD supplementation is an effective strategy to help prevent the loss of skeletal muscle size, skeletal muscle function and body composition in middle-aged women, forty eight women (45-60 yrs old) will be recruited to complete a 12-week intervention (n=12 per group; 4 groups). Participants will be randomized to complete a non-exercise control period or a resistance exercise training program. In a double-blinded fashion, participants in the non-exercise or resistance exercise groups will be randomized to consume either placebo or HMB+VitD. Before and after each intervention the investigators will evaluate skeletal muscle size, skeletal muscle function, and body composition. ;
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