Abstract
PURPOSE: To establish the effects of race and exercise therapy on energy expenditure and oxygen consumption in pediatric obesity patients. METHODS: We evaluated 297 patients (African American (AA) 101, Caucasian(C) 196) using a Modified Balke protocol pre and post 16 week weight management program. All tests were maximal efforts. ACSM formulas were used to calculate actual and expected energy expenditure from measured and estimated oxygen consumption, weight and exercise time (ExTime). RESULTS: There was a significant increase in age (12.2± 2.6 vs 12.8 ± 2.6 AA,11.8 ± 2.9 vs 12.3 ± 2.8 C, years) and height (1.56 ± 0.11 vs 1.58 ± 0.11, AA, 1.55±0.15 vs 1.57±0.14 C, meters) (P<0.01) and a significant decrease in weight for C (85.9 ± 28.9 vs 83.1 ± 27.8 kilograms) (P<0.01) pre vs post. AA were significantly heavier that C pre (93.6 ± 28.2 AA vs 85.9 ± 28.9 kg) (P<0.05). Indexed maximal VO2 (IVO2), ExTime, and Total Kilocalories of energy expenditure (Kcals) increased significantly with no change in respiratory quotient (RQ) post program in both AA and C. Kcals and ExTime were significantly higher in C compared to AA pre and post.TABLEDISCUSSION: These data indicate that a 16 week weight management program resulted in an increase aerobic capacity and energy expenditure in these obese AA and C pediatric patients with increased energy expenditure in C pre and post when compared with AA. CONCLUSION: A 16 week weight management program resulted in improved maximal aerobic capacity and energy expenditure in AA and C obese patients. Race does affect energy expenditure. Additionally, estimated energy expenditure significantly overestimated actual energy expenditure in both racial groups pre and post.
Published Version
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