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Energy metabolism in free-living, ‘large-eating’ and ‘small-eating’ women: studies using 2H218O

Published online by Cambridge University Press:  09 March 2007

Dallas Clark ,
Frank Tomas ,
Robert T. Withers ,
Colin Chandler ,
Menno Brinkman ,
John Phillips ,
Michael Berry ,
F. John Ballard  and
Paul Nestel
Dallas Clark
Affiliation:
CSIRO (Australia), Division of Human Nutrition, Kintore Avenue, Adelaide, South Australia5000
Frank Tomas
Affiliation:
CSIRO (Australia), Division of Human Nutrition, Kintore Avenue, Adelaide, South Australia5000
Robert T. Withers
Affiliation:
Exercise Physiology Laboratory, School of Education, School of Medicine, The Flinders University of South Australia, Bedford Park, South Australia5042
Colin Chandler
Affiliation:
CSIRO (Australia), Division of Human Nutrition, Kintore Avenue, Adelaide, South Australia5000
Menno Brinkman
Affiliation:
CSIRO (Australia), Division of Human Nutrition, Kintore Avenue, Adelaide, South Australia5000
John Phillips
Affiliation:
Department of Medical Biochemistry, School of Medicine, The Flinders University of South Australia, Bedford Park, South Australia5042
Michael Berry
Affiliation:
Department of Medical Biochemistry, School of Medicine, The Flinders University of South Australia, Bedford Park, South Australia5042
F. John Ballard
Affiliation:
CSIRO (Australia), Division of Human Nutrition, Kintore Avenue, Adelaide, South Australia5000
Paul Nestel
Affiliation:
CSIRO (Australia), Division of Human Nutrition, Kintore Avenue, Adelaide, South Australia5000
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Abstract

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The doubly-labelled water (2H218O) technique was used to assess the long-term rates of energy expenditure and, after accounting for any changes in body composition, the derived rates of energy intake in weight-stable ‘large-eating’ (n 6) and ‘small-eating’ (n 6) women. The self-reported energy intakes (approximately 11.2 v. 5.6 MJ/d) and energy expenditures (approximately 8.5 v. 12.4 MJ/d) for the ‘large-eating’ and ‘small-eating’ groups respectively, should not be sustainable without significant body-weight changes. 2H218O-assessed rates of energy expenditure for the ‘large-eaters’ (approximately 8.5 MJ/d) and ‘small-eaters’ (approximately 11.3 MJ/d) were in close agreement with the results obtained using 5 d, self-reported activity diaries but the derived rates of energy intake for the ‘large-’ (approximately 8.5 MJ/d) and ‘small-eaters’ (approximately 10.8 MJ/d) were markedly different from those obtained using self-reported, weighed food diaries. When two ‘small-eaters’ were supplied with their self-reported energy intakes (approximately 5 MJ/d) for up to 28 d both subjects lost about 0.75 kg body-weight/week. These results provide no support for the existence of ‘metabolically efficient’ women in the community.

Keywords

Energy metabolismDoubly-labelled waterEating disorders
Type
Energy expentidure and its measurement
Information
British Journal of Nutrition , Volume 72 , Issue 1 , July 1994 , pp. 21 - 31
Copyright
Copyright © The Nutrition Society 1994

References

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