Grade of adiposity affects the impact of fat mass on resting energy expenditure in women

Body fat mass (FM) adds to the variance in resting energy expenditure (REE). However, the nature and extent of this relationship remains unclear. Using a database of 1306 women and a linear regression model, we systematically analysed the contribution of FM to the total variance in REE at different...

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Bibliographic Details
Published in:British journal of nutrition 2009-02, Vol.101 (4), p.474-477
Main Authors: Bosy-Westphal, Anja, Müller, Manfred J., Boschmann, Michael, Klaus, Susanne, Kreymann, Georg, Lührmann, Petra M., Neuhäuser-Berthold, Monika, Noack, Rudolf, Pirke, Karl M., Platte, Petra, Selberg, Oliver, Steiniger, Jochen
Format: Article
Language:English
Subjects:
Adipocytes
Adipose Tissue - metabolism
Adiposity - physiology
Adult
Age
Aging - physiology
Basal Metabolism - physiology
Biological and medical sciences
Body Composition
Body fat
Calorimetry, Indirect
Electric Impedance
Energy
Energy Metabolism - physiology
Fat mass
Fat-free mass
Feeding. Feeding behavior
Female
Fundamental and applied biological sciences. Psychology
Humans
Linear Models
mathematical models
Metabolism
Middle Aged
Models, Biological
Musculoskeletal system
nutritional status
Obesity - metabolism
Regression analysis
Resting energy expenditure
Vertebrates: anatomy and physiology, studies on body, several organs or systems
Women
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Summary:Body fat mass (FM) adds to the variance in resting energy expenditure (REE). However, the nature and extent of this relationship remains unclear. Using a database of 1306 women and a linear regression model, we systematically analysed the contribution of FM to the total variance in REE at different grades of adiposity (ranges of body %FM). After adjusting for age, the relative contribution of FM on REE variance increased from low ( ≤ 10 %FM) to normal (>10– ≤ 30 %FM) and moderately elevated (>30– ≤ 40 %FM) grades of adiposity but decreased sharply at high (>40– ≤ 50 %FM) and very high (>50 %FM) grades of adiposity according to the ratio between regression coefficients. These data suggest that the specific metabolic rate of fat tissue is reduced at high adiposity. This should be considered when REE is normalized for FM in obesity.
ISSN:0007-1145
1475-2662
DOI:10.1017/S0007114508020357