Resting metabolic rate in preadolescent girls at high risk of obesity

Wurmser, H; Laessle, R; Jacob, K; Langhard, S; Uhl, H; Angst, A; Müller, A; Pirke, K M
August 1998
International Journal of Obesity & Related Metabolic Disorders;Aug1998, Vol. 22 Issue 8, p793
Academic Journal
OBJECTIVE: To investigate whether children at high risk of obesity have a reduced resting metabolic rate (RMR). DESIGN: Cross-sectional study. SUBJECTS: 93 healthy girls (age: 8–12 y) were allocated to one of four groups, according to the subjects’ and their parents’ weight status: group 1, overweight children with both parents overweight (OB/OB2; n=17); group 2, normal weight children with both parents overweight (N/OB2; n=28); group 3, overweight children of discordant parents (OB/OB1; n=21) and group 4, normal weight children with both parents normal weight (N/OB0; n=27). MEASUREMENTS: Weight, height, fat-free mass (FFM) and fat mass (FM) by bioelectrical impedance analysis (BIA), RMR (indirect calorimetry) for the duration of 25 min. RESULTS: Controlling for disparities in body composition, age and physical maturity, significant differences were found in adjusted group means of RMR (OB/OB2 1181 kcal/d; N/OB2 1276 kcal/d; OB/OB1 1234 kcal/d; N/OB0 1199 kcal/d; P<0.02) with the OB/OB2 girls showing the lowest energy expenditure. CONCLUSION: We found evidence that preadolescent girls at risk of obesity, are not generally predisposed to a higher body weight, because of a greater metabolic efficiency. In fact, our data show that more emphasis should be laid on defining different subgroups of both overweight and normal weight subjects in studies investigating metabolic rate.


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