Development and validation of energy expenditure prediction models based on GT3X accelerometer data in 5- to 9-year-old children

Jimmy, Gerda; Seiler, Roland; Mäder, Urs (2013). Development and validation of energy expenditure prediction models based on GT3X accelerometer data in 5- to 9-year-old children. Journal of Physical Activity and Health, 10, pp. 1057-1067. Human Kinetics

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Background: Accelerometry has been established as an objective method that can be used to assess physical activity behavior in large groups. The purpose of the current study was to provide a validated equation to translate accelerometer counts of the triaxial GT3X into energy expenditure in young children. Methods: Thirty-two children aged 5–9 years performed locomotor and play activities that are typical for their age group. Children wore a GT3X accelerometer and their energy expenditure was measured with indirect calorimetry. Twenty-one children were randomly selected to serve as development group. A cubic 2-regression model involving separate equations for locomotor and play activities was developed on the basis of model fit. It was then validated using data of the remaining children and compared with a linear 2-regression model and a linear 1-regression model. Results: All 3 regression models produced strong correlations between predicted and measured MET values. Agreement was acceptable for the cubic model and good for both linear regression approaches. Conclusions: The current linear 1-regression model provides valid estimates of energy expenditure for ActiGraph GT3X data for 5- to 9-year-old children and shows equal or better predictive validity than a cubic or a linear 2-regression model.

Item Type:

Journal Article (Original Article)

Division/Institute:

07 Faculty of Human Sciences > Institute of Sport Science (ISPW)
07 Faculty of Human Sciences > Institute of Sport Science (ISPW) > Sport Science II

UniBE Contributor:

Seiler, Roland

Subjects:

700 Arts > 790 Sports, games & entertainment
600 Technology > 610 Medicine & health

Publisher:

Human Kinetics

Language:

English

Submitter:

Roland Seiler

Date Deposited:

28 Mar 2014 12:09

Last Modified:

28 Mar 2014 12:09

Uncontrolled Keywords:

physical activity measurement, value calibration, triaxial accelerometer

URI:

https://boris.unibe.ch/id/eprint/41237

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