Comparison of three generations of ActiGraph (TM) activity monitors in children and adolescents

Robusto, Kristi M. & Trost, Stewart G. (2012) Comparison of three generations of ActiGraph (TM) activity monitors in children and adolescents. Journal of Sports Sciences, 30(13), pp. 1429-1435.

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Abstract

In this study, we evaluated agreement among three generations of ActiGraph (TM) accelerometers in children and adolescents. Twenty-nine participants (mean age = 14.2 +/- 3.0 years) completed two laboratory-based activity sessions, each lasting 60 min. During each session, participants concurrently wore three different models of the ActiGraph (TM) accelerometers (GT1M, GT3X, GT3X+). Agreement among the three models for vertical axis counts, vector magnitude counts, and time spent in moderate-to-vigorous physical exercise (MVPA) was evaluated by calculating intraclass correlation coefficients and Bland-Altman plots. The intraclass correlation coefficient for total vertical axis counts, total vector magnitude counts, and estimated MVPA was 0.994 (95% CI = 0.989-0.996), 0.981 (95% CI = 0.969-0.989), and 0.996 (95% CI = 0.989-0.998), respectively. Inter-monitor differences for total vertical axis and vector magnitude counts ranged from 0.3% to 1.5%, while inter-monitor differences for estimated MVPA were equal to or close to zero. On the basis of these findings, we conclude that there is strong agreement between the GT1M, GT3X, and GT3X+ activity monitors, thus making it acceptable for researchers and practitioners to use different ActiGraph (TM) models within a given study.

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ID Code: 71862
Item Type: Journal Article
Refereed: Yes
Additional Information: ISI Document Delivery No.: 008XJ
Times Cited: 3
Cited Reference Count: 14
Robusto, Kristi M. Trost, Stewart G.
Taylor & francis ltd
Abingdon; <Go to ISI>://WOS:000308989600012
Keywords: Physical activity, assessment, objective measurement, accelerometer, youth, physical-activity, accelerometers, agreement
DOI: 10.1080/02640414.2012.710761
ISSN: 0264-0414
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Deposited On: 21 May 2014 03:16
Last Modified: 22 May 2014 06:04

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