An investigation of a novel three-dimensional activity monitor to predict free-living energy expenditure
- 1 April 2008
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Sports Sciences
- Vol. 26 (6), 553-561
- https://doi.org/10.1080/02640410701708979
Abstract
The aim of this study was to assess the capability of the 3dNX™ 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 3dNX™ 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. 3dNX™ 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 3dNX™ output was combined with body composition variables. The 3dNX™ 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 3dNX™ provides a useful method of predicting energy expenditure in free-living individuals.Keywords
This publication has 27 references indexed in Scilit:
- Estimation of Oxygen Uptake during Fast Running Using Accelerometry and Heart RateMedicine & Science in Sports & Exercise, 2007
- The evolution of physical activity recommendations: how much is enough?The American Journal of Clinical Nutrition, 2004
- COULD THE CORRELATION BETWEEN MAXIMAL OXYGEN UPTAKE AND ???ECONOMY??? BE SPURIOUS?Medicine & Science in Sports & Exercise, 2003
- Estimating Human Energy ExpenditureSports Medicine, 2003
- Field evaluation of energy expenditure in women using Tritrac accelerometersMedicine & Science in Sports & Exercise, 2002
- Use of a triaxial accelerometer to validate reported food intakesThe American Journal of Clinical Nutrition, 2001
- Physical activity assessed by activity monitor and doubly labeled water in childrenMedicine & Science in Sports & Exercise, 2001
- Measuring agreement in method comparison studiesStatistical Methods in Medical Research, 1999
- Validity of heart rate, pedometry, and accelerometry for predicting the energy cost of children’s activitiesJournal of Applied Physiology, 1998
- Daily physical activity assessment: comparison between movement registration and doubly labeled waterJournal of Applied Physiology, 1996