F-29 Free Communication/Poster - Macronutrient Metabolism III - Fats: JUNE 3, 2011 1:00 PM - 6:00 PM: ROOM: Hall B
Aerobic training is known as a powerful strategy for weight control. Despite much interest in exercise-induced fat loss, the optimal exercise prescription to maximize fat loss remains elusive.
PURPOSE: To examine the effects of 15-week aerobic exercise training performed at high and low intensities on body composition and lipid profiles.
METHODS: Twenty-two inactive healthy Korean females (mean BMI= 26.7), aged 30-49, were divided into one of three groups, i.e., high intensity training group (HTR: jogging at 70% VO2max, n=7), low intensity training group (LTR: walking at 50% VO2max, n=8), and control group (CON, n=7). Equal amount of exercise was given to both training groups [energy expenditure (EE): 13.5 METs·h/w] and EE was increased by 4.5 METs·h/w every five weeks in both training groups. Repeated two-way ANOVA and proper post hoc test were performed to find difference of means between two tests and among three groups.
RESULTS: Weight, BMI, and fat mass (P<.05) significantly decreased in HTR, but not in LTR and CON. HDL-C (P<.05) significantly increased following HTR; however, total cholesterol, triglyceride, and LDL-C were unaltered in all three groups. VO2max increased significantly in HTR (P<0.01) and marginally in LTR (P=0.05). Percent body fat in the HTR tended to decrease, but there was no statistically significant change.
CONCLUSIONS: A significant reduction in fat mass and an increase in HDL-C were found only following high intensity aerobic exercise training, despite a significant increase in VO2max in both groups. Results indicate that high intensity aerobic exercise training may be more beneficial than low intensity training, for controlling body weight and blood lipid profiles in inactive healthy middle-aged women.