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Relation between energy expenditure and body composition in man: specific energy expenditure in vivo of fat and fat-free tissue.
Eur J Clin Nutr 1988; 42(4):301-5EJ

Abstract

The relationship between energy expenditure and body composition, in terms of fat and fat-free masses, has previously been described by a variety of predictive regression equations with parameters devoid of physiological content. We present here results obtained by calculating the specific energy expenditure, ie, the energy expenditure per unit of mass, of fat and fat-free tissue on the basis of measurements of the total energy expenditure (EE), the masses of fat (FM), and fat-free (FFM) tissue using the following simple model: EE = k1.FM + k2.FFM where k1 and k2 are the specific energy expenditures of fat and fat-free tissue, respectively. The results of observations on 104 women at rest yielded values for k1 and k2 of 0.31 and 1.35 watts/kg of fat and fat-free mass, respectively, with standard errors of estimate of 0.074 and 0.052 watts/kg, respectively. Analysis of several series of measurements, from other sources and on smaller samples of subjects, yielded similar values at rest but with larger standard errors of estimate. Data from subjects performing varying amounts of work in 24-h measurements showed, as expected, larger values for both tissues. The results explain to a very large extent the well-established relation between resting metabolic rate and body weight, ie, a linear relation with a non-zero intercept. The results also offer a clear-cut explanation for the well known difference in energy expenditure between men and women with the same body weight.

Authors+Show Affiliations

Department of Physiology, Odense University, Denmark.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

3396522

Citation

Garby, L, et al. "Relation Between Energy Expenditure and Body Composition in Man: Specific Energy Expenditure in Vivo of Fat and Fat-free Tissue." European Journal of Clinical Nutrition, vol. 42, no. 4, 1988, pp. 301-5.
Garby L, Garrow JS, Jørgensen B, et al. Relation between energy expenditure and body composition in man: specific energy expenditure in vivo of fat and fat-free tissue. Eur J Clin Nutr. 1988;42(4):301-5.
Garby, L., Garrow, J. S., Jørgensen, B., Lammert, O., Madsen, K., Sørensen, P., & Webster, J. (1988). Relation between energy expenditure and body composition in man: specific energy expenditure in vivo of fat and fat-free tissue. European Journal of Clinical Nutrition, 42(4), pp. 301-5.
Garby L, et al. Relation Between Energy Expenditure and Body Composition in Man: Specific Energy Expenditure in Vivo of Fat and Fat-free Tissue. Eur J Clin Nutr. 1988;42(4):301-5. PubMed PMID: 3396522.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Relation between energy expenditure and body composition in man: specific energy expenditure in vivo of fat and fat-free tissue. AU - Garby,L, AU - Garrow,J S, AU - Jørgensen,B, AU - Lammert,O, AU - Madsen,K, AU - Sørensen,P, AU - Webster,J, PY - 1988/4/1/pubmed PY - 1988/4/1/medline PY - 1988/4/1/entrez SP - 301 EP - 5 JF - European journal of clinical nutrition JO - Eur J Clin Nutr VL - 42 IS - 4 N2 - The relationship between energy expenditure and body composition, in terms of fat and fat-free masses, has previously been described by a variety of predictive regression equations with parameters devoid of physiological content. We present here results obtained by calculating the specific energy expenditure, ie, the energy expenditure per unit of mass, of fat and fat-free tissue on the basis of measurements of the total energy expenditure (EE), the masses of fat (FM), and fat-free (FFM) tissue using the following simple model: EE = k1.FM + k2.FFM where k1 and k2 are the specific energy expenditures of fat and fat-free tissue, respectively. The results of observations on 104 women at rest yielded values for k1 and k2 of 0.31 and 1.35 watts/kg of fat and fat-free mass, respectively, with standard errors of estimate of 0.074 and 0.052 watts/kg, respectively. Analysis of several series of measurements, from other sources and on smaller samples of subjects, yielded similar values at rest but with larger standard errors of estimate. Data from subjects performing varying amounts of work in 24-h measurements showed, as expected, larger values for both tissues. The results explain to a very large extent the well-established relation between resting metabolic rate and body weight, ie, a linear relation with a non-zero intercept. The results also offer a clear-cut explanation for the well known difference in energy expenditure between men and women with the same body weight. SN - 0954-3007 UR - https://www.unboundmedicine.com/medline/citation/3396522/Relation_between_energy_expenditure_and_body_composition_in_man:_specific_energy_expenditure_in_vivo_of_fat_and_fat_free_tissue_ DB - PRIME DP - Unbound Medicine ER -