Energy-metabolism adaptation in obese adults on a very-low-calorie diet.

doi:10.1093/AJCN/53.4.826

Paper

Energy-metabolism adaptation in obese adults on a very-low-calorie diet.

Published Apr 1, 1991 · J. Fricker, Raymond Rozen, Jean-Claude Melchior

The American journal of clinical nutrition

Q1 SJR score

48

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1

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Abstract

In this study, six obese women received a very-low-calorie diet (VLCD) for 3 wk. At day 0, body composition was assessed with a bioelectric impedance analyzer. The evolution in lean body mass (LBM) during the VLCD was estimated from nitrogen balance, measuring urine and fecal losses and taking into account skin, nitrate, and menstrual losses to avoid underestimation bias that could explain the decreased ratio of resting metabolic rate (RMR) to LBM previously reported. RMR was measured at days 0, 3, 5, and 21. The RMR-LBM ratio declined significantly during the VLCD period and decreased faster during the first week; the day 3, day 5, and day 21 ratio values were 94%, 91%, and 82%, respectively, of the original. The RMR-LBM ratio decrease after 21 d of a VLCD was near that found in chronic undernutrition. Results of previous studies that did not find any drop in the RMR-LBM ratio in obese adults on VLCDs might be explained by their LBM-assessment methods.

Non-RCT

Study Snapshot

Key takeawayObese women on a very-low-calorie diet experience significant reduction in their resting metabolic rate-to-lean body mass ratio, similar to chronic undernutrition.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Energy-metabolism adaptation in obese adults on a very-low-calorie diet.

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