Document Detail

Body composition and resting energy expenditure in humans: role of fat, fat-free mass and extracellular fluid.
MedLine Citation:
PMID:  11033984     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The objective of this study was to determine whether there are independent effects of extracellular fluid volume (ECF) and fat mass (FM) on resting energy expenditure (REE) relative to fat-free mass (FFM) in adult men and women.
METHODS: Multiple linear regression analysis was used to relate REE, as determined by indirect calorimetry, to FFM and FM (measured using dual energy X-ray absorptiometry) and ECF (measured using bromide space and/or the radiosulfate washout space) in 153 women and 100 men with varying amounts of body fat.
RESULTS: REE correlated significantly with FFM and FM in women (r=0.65 and r=0.63, both P<0.001) and men (r=0.62 and r=0.48, both P<0.001, FFM and FM, respectively). In a multiple linear regression analysis FFM, FM and age significantly contributed to the ability to predict REE in both genders. The models that were derived were not significantly different between women and men. In women the contribution to REE from FM was easier to detect when FM was greater. Adjustment of FFM for ECF did not improve the relationship between FFM and REE.
CONCLUSIONS: FFM, FM and age are significant, independent predictors of REE in both men and women. Adjustment of FFM for ECF does not improve the ability of FFM to predict REE, which suggests that ECF is a highly integrated component of FFM in healthy adults. Expressing REE relative to FFM alone will introduce errors when lean and obese populations are compared.
S Nielsen; D D Hensrud; S Romanski; J A Levine; B Burguera; M D Jensen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  International journal of obesity and related metabolic disorders : journal of the International Association for the Study of Obesity     Volume:  24     ISSN:  -     ISO Abbreviation:  Int. J. Obes. Relat. Metab. Disord.     Publication Date:  2000 Sep 
Date Detail:
Created Date:  2000-10-18     Completed Date:  2000-11-13     Revised Date:  2014-06-03    
Medline Journal Info:
Nlm Unique ID:  9313169     Medline TA:  Int J Obes Relat Metab Disord     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1153-7     Citation Subset:  IM    
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MeSH Terms
Absorptiometry, Photon
Adipose Tissue / metabolism*
Basal Metabolism*
Body Composition*
Calorimetry, Indirect
Extracellular Space / metabolism*
Linear Models
Obesity / metabolism*
Prospective Studies
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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