Comparing the validity and output of the GT1M and GT3X accelerometer in 5- to 9-year-old children

Jimmy, Gerda; Seiler, Roland; Mäder, Urs (2013). Comparing the validity and output of the GT1M and GT3X accelerometer in 5- to 9-year-old children. Measurement in Physical Education and Exercise Science, 17(3), pp. 236-248. Taylor & Francis Group 10.1080/1091367X.2013.805140

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The purpose of this study was to compare the validity and output of the biaxial ActiGraph GT1M and the triaxial GT3X (ActiGraph, LLC, Pensacola, FL, USA)accelerometer in 5- to 9-year-old children. Thirty-two children wore the two monitors while their energy expenditure was measured with indirect calorimetry. They performed four locomotor and four play activities in an exercise laboratory
and were further measured during 12 minutes of a sports lesson. Validity evidence in relation to indirect calorimetry was examined with linear regression equations applied to the laboratory data. During the sports lessons predicted energy expenditure according to the regression equations was
compared to measured energy expenditure with the Wilcoxon-signed rank test and the Spearman correlation. To compare the output, agreement between counts of the two monitors during the laboratory activities was assessed with Bland-Altman plots. The evidence of validity was similar for both monitors.
Agreement between the output of the two monitors was good for vertical counts (mean bias = −14 ± 22 counts) but not for horizontal counts (−17 ± 32 counts). The current results indicate that the two accelerometer models are able to estimate energy expenditure of a range of physical activities equally well in young children. However, they show output differences for movement in the
horizontal direction.

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 [discontinued]
UniBE Contributor:	Seiler, Roland
Subjects:	100 Philosophy > 150 Psychology 700 Arts > 790 Sports, games & entertainment
ISSN:	1091-367X
Publisher:	Taylor & Francis Group
Language:	English
Submitter:	Roland Seiler
Date Deposited:	28 Mar 2014 12:11
Last Modified:	02 Mar 2023 23:24
Publisher DOI:	10.1080/1091367X.2013.805140
Uncontrolled Keywords:	physical activity assessment, children, accelerometry, ActiGraph
URI:	https://boris.unibe.ch/id/eprint/41232