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1General Clinical Research Center, Massachusetts Institute of Technology, Cambridge 02139; 2Department of Health Sciences, Boston University, Boston, 02215; 3Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy, 4Jean Mayer United States Department of Agriculture Human Nutrition Research Center on Aging, and 5Department of Family Medicine and Community Health, Tufts University School of Medicine, Boston, Massachusetts 02111; and 6Division of Nutrition and Physical Activity, Center for Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia 30341
Submitted 10 September 2003 ; accepted in final form 12 November 2003
Resting metabolic rate (RMR) and body composition were measured in 44 initially nonoverweight girls at three time points relative to menarche: premenarche (Tanner stage 1 or 2), menarche (±6 mo), and 4 yr after menarche. Mean absolute RMR was 1,167, 1,418, and 1,347 kcal/day, respectively. Absolute RMR was statistically significantly higher at menarche than at 4 yr after menarche despite statistically significantly less fat-free mass (FFM) and fat mass (FM), suggesting an elevation in RMR around the time of menarche. The pattern of change in RMR, adjusted for FFM, log transformed FM, age, race, parental overweight, and two interactions (visit by parental overweight, parental overweight by FFM), was also considered. Adjusted RMR did not differ statistically between the visits for girls with two normal-weight parents. For girls with at least one overweight parent, adjusted RMR was statistically significantly lower 4 yr after menarche than at premenarche or menarche. Thus parental overweight may influence changes that occur in RMR during adolescence in girls.
parental overweight; puberty; adolescence; obesity; energy expenditure
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