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Wolverhampton Intellectual Repository and E-Theses > School of Sport, Performing Arts and Leisure > Research Centre for Sport, Exercise and Performance > Exercise and Health > An investigation of a novel three-dimensional activity monitor to predict free-living energy expenditure.

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Title: An investigation of a novel three-dimensional activity monitor to predict free-living energy expenditure.
Authors: Carter, James
Wilkinson, David
Blacker, Sam
Rayson, Mark
Bilzon, James
Izard, Rachel
Coward, Andy
Wright, Antony
Nevill, Alan M.
Rennie, Kirsten
McCaffrey, Tracey
Livingstone, Barbara
Citation: Journal of Sports Sciences, 26(6): 553-561
Publisher: Routledge (Taylor & Francis)
Journal: Journal of Sports Sciences
Issue Date: 2008
DOI: 10.1080/02640410701708979
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Abstract: The aim of this study was to assess the capability of the 3dNXTM accelerometer to predict energy expenditure in two separate, free-living cohorts. Twenty-three adolescents and 14 young adults took a single dose of doubly labelled water and wore a 3dNXTM activity monitor during waking hours for a 10-day period while carrying out their normal routines. Multiple linear regression with backward elimination was used to establish the strength of the associations between various indices of energy expenditure, physical activity counts, and anthropometric variables. 3dNXTM output accounted for 27% and 35% of the variance in the total energy expenditure of the adolescent and young adult cohort, respectively. The explained variance increased to 78%, with a standard error of estimate of 7%, when 3dNXTM output was combined with body composition variables. The 3dNXTM accelerometer can be used to predict free-living daily energy expenditure with a standard error of estimate of 1.65 MJ in adolescents and 1.52 MJ in young adults. The inclusion of anthropometric variables reduces the error to approximately 1 MJ. Although it remains to cross-validate these models in other populations, early indications suggest that the 3dNXTM provides a useful method of predicting energy expenditure in free-living individuals.
Type: Article
Language: en
Keywords: Triaxial accelerometers
Energy expenditure
Stable isotopes
Physical activity
Young adults
ISSN: 02640414
Appears in Collections: Exercise and Health
Learning and Teaching in Sport, Exercise and Performance

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