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1996 Dec;6(4):356-69. Links Body fat percentage and gender: associations with exercise energy expenditure, substrate utilization, and mechanical work efficiency.Keim NL, Belko AZ, Barbieri TF.USDA, ARS, Western Human Nutrition Research Center, Presidio of San Francisco, CA 94129, USA.Energy expenditure (EE) was measured at compare prices specific steady-state work rates to determine if body fat percentage or gender was associated compare prices with exercise EE, substrate oxidation, or work efficiency. compare prices Body fat percentage (leaner vs. fatter men, 9-15% vs. 20-25% fat; leaner vs. fatter women, 16-24% vs. 32-48% fat) was not related to work efficiency or submaximal EE. Fatness affected substrate oxidation in men but not in women. Compared to fatter men, leaner men had higher fat oxidation (6.7 +/- 1.6 vs. 1.4 +/- 2.0 mg.kg fat-free mass [FFM]-1.min-1; p < .01) and lower carbohydrate oxidation (26.6 +/- 4.2 vs. 39.3 +/- 5.0 mg.kg FFM-1.min-1; p < .01) at 60% VO2max. When men and women of similar fatness and relative aerobic capacity were compared, men had higher EE measured as kilojoules per minute but similar rates of EE and substrate oxidation per kilogram of FFM at 40-60% VO2max.
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