Effects of Weight Loss on Lean Mass, Strength, Bone, and Aerobic Capacity.

Purpose: To evaluate the hypothesis that exercise attenuates the reductions in lean mass, muscle strength, BMD, and VO2max that accompany modest weight loss induced by calorie restriction. Methods: Overweight, sedentary women and men (n=52, 45-65y) were randomized to 6-8% weight loss by using calorie restriction (CR), endurance exercise (EX), or both (CREX). The CR and CREX groups underwent counseling to reduce energy intake by 20% and 10%, respectively. The EX and CREX groups exercised 7.4+/-0.5 and 4.4+/-0.5 hr/wk, respectively. Before and after 16.8+/-1.1 weeks of weight loss, lean mass and BMD were measured with dual-energy X-ray absorptiometry, strength was measured with dynamometry, and aerobic capacity (VO2max) was measured with indirect calorimetry during maximal-intensity treadmill exercise. Results: Weight loss was ~7% in all groups. Decreases in whole body (~2%, p=0.003) and lower extremity (~4%, p

from Sports Medicine via xlomafota13 on Inoreader http://ift.tt/2c5WUbL
via IFTTT