FEMALES USE FAT BETTER AT VERY LOW EXERCISE INTENSITIES
Kang, J., Hoffman, J., Ratamess, N., Faigenbaus, A., & Faalvo, M. (2005). Gender differences in fat utilization: Effect of exercise intensity. Medicine and Science in Sports and Exercise, 37(5), Supplement abstract 1418.
Ss (M = 11; F = 11) were screened once and underwent four experimental trials. In experimental trials, Ss performed a 10-minute steady-state cycling exercise at 40, 50, 60, or 70% VO2peak. Rate and relative contribution of fat oxidation were determined from VO2 and RER.
At all intensities, VO2 was higher in men than women. There were no gender differences in relative contribution of fat to total energy expenditure. Rate of fat use was higher in women than in men only at the 40% intensity.
Implication. Females derive greater energy from fat at very low exercise intensities but not at higher intensities.
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