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Am J Physiol Endocrinol Metab 282: E923-E930, 2002. First published December 4, 2001; doi:10.1152/ajpendo.00265.2001
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Vol. 282, Issue 4, E923-E930, April 2002

Pattern and cost of weight gain in previously obese women

S. B. Votruba, S. Blanc, and D. A. Schoeller

Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53706

Weight gain is common among postobese individuals, providing an opportunity to address the cost of weight regain on energy expenditure. We investigated the energy cost of weight regain over 1 yr in 28 women [age 39.5 ± 1.3 (SE) yr; body mass index 24.2 ± 0.5 kg/m2] with recent weight loss (>12 kg). Body composition, total energy expenditure (TEE) using doubly labeled water, resting metabolic rate (RMR), and thermic effect of a meal (TEM) were assessed at 0 and 12 mo. Metabolizable energy intake (MEI) was calculated from TEE and change in body composition. Fourteen women had a weight gain of 13.2 ± 2.1 kg. Twelve-month cumulative excess MEI, calculated as the intake in excess of TEE at month 0, was 749 ± 149 MJ. Of this, 462 ± 83 MJ (62%) were stored as accrued tissue, and 287 ± 72 MJ (38%) was increased TEE. Expressed per kilogram of body weight gain, the energy cost of weight gain was calculated to be 54.8 ± 4.6 MJ/kg. Interestingly, weight regain time courses fell into three distinct patterns, possibly requiring varying countermeasures.

energy expenditure; weight maintenance; stable isotopes


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