Correcting physical activity energy expenditure for body size in children |
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| Authors: | R. A. Abbott P. S. W. Davies |
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| Affiliation: | 1. Children's Nutrition Research Centre, Department of Paediatrics and Child Health, University of Queensland, Royal Children's Hospital, Herston QLD 4029, Australia;2. School of Human Movement Studies, University of Queensland, St Lucia QLD 4072, Australia;3. School of Human Movement Studies, Queensland University of Technology, Kelvin Grove, QLD 4059, Australiara.abbott@somc.uq.edu.au |
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| Abstract: | Being able to compare the energy cost of physical activity across and between populations is important. However, energy expenditure is related to body size, so it is necessary to appropriately adjust for differences in body size when comparisons are made. This study examined the relationship between the daily energy cost of activity and body weight in 47 children aged 6–10 years. Log–log regression showed weight1.0 to be an inappropriate adjustment for activity energy expenditure in children, with a more valid adjustment being weight0.3. Clearly, both weight dependent and non-weight dependent activities are part of everyday living in children. This balance influences how energy expenditure is correctly adjusted for body size. Investigators interpreting data of energy expenditure in children from children of different body sizes need to take this into consideration. |
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