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Differences in energy metabolism between normal weight 'large-eating' and 'small-eating' women

Differences in energy metabolism between normal weight 'large-eating' and 'small-eating' women

British Journal of Nutrition 68(1): 31-44

Nine 'large-eating' (approximately 12 MJ/d) and nine 'small-eating' (approximately 5.3 MJ/d) women were selected from the population on the basis of diet and activity diaries. At rest and in the post-absorptive state the rate of oxygen consumption (V(02))/kg fat-free mass (FFM) and rate of carbon dioxide production (V(CO2))/kg FFM were 9-17% higher (P < 0.05) in the 'large-eaters' than in the 'small-eaters'. As energy expenditure was increased by walking at 2.4, 3.9 and 5.4 km/h the differences between the two experimental groups for both V(O2)/kg FFM and V(CO2)/kg FFM were decreased to negligible values, but energy expended on a body-weight basis (MJ/kg per min) remained significantly higher (5-10%) in 'large-eaters'. Oral temperature was also consistently higher (up to 0.5 degrees) in this group both at rest and during sitting, standing and walking activities. Although the average thermic effect of a standardized liquid meal tended to be higher (27%; not significant) in the 'small-eaters', the other results demonstrate that the 'large-eating' females had a markedly higher rate of energy expenditure at rest and during light physical activities.

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Accession: 002072279

Download citation: RISBibTeXText

PMID: 1390615

DOI: 10.1079/bjn19920064

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