Exercise, Fat & Metabolism - Study
The Effect of Low-Intensity Exercise Training
on Fat Metabolism of Obese Women
Fat Metabolism Study - Aim
Previous studies have shown that fat metabolism is different in upper
body (UB) and lower body (LB) obese women. The present study investigated
whether the effect of low-intensity exercise training on fat metabolism
is different in UB and LB obese premenopausal women.
Fat Metabolism Study - Methods
Twenty-one healthy, premenopausal women with either LB obesity (waist-to-hip
ratio of 0.79; n = 8) or UB obesity (waist-to-hip ratio of 0.85; n = 13)
participated in the present study. The UB obese women were matched and
randomly divided in an exercise training group (UB) and a nonexercising
control group (UB-C). Subjects in the UB and LB groups participated in
a low-intensity exercise training program (40 percent VO2max) three times
per week for 12 weeks. Before and after the intervention, measurements
of fat metabolism at rest and during exercise, body composition, and maximal
aerobic capacity were performed.
Fat Metabolism Study - Results
Exercise training did not change the respiratory exchange ratio at rest
in the UB and LB groups. During exercise, relative fat oxidation increased
in the UB group by 19 percent (p < 0.05), whereas no change in the
LB and UB-C groups was found. Plasma free fatty acid oxidation did not
change by exercise training, and nonplasma fatty acid oxidation tended
to increase in the UB group compared with the UB-C group (p = 0.08).
Fat Metabolism Study - Issues
Low-intensity exercise training increased the contribution of fat oxidation
to total energy expenditure during exercise but not at rest in UB obese
women. Exercise training had no significant effect on fat metabolism in
the LB obese women.
Source: Maastricht University. 2003
Weight Loss News
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