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Comparison of children’s free-living physical activity derived from wrist and hip raw accelerations during the segmented week

Noonan, RJ and Boddy, LM and Kim, Y and Knowles, ZR and Fairclough, SJ (2016) Comparison of children’s free-living physical activity derived from wrist and hip raw accelerations during the segmented week. Journal of Sports Sciences. ISSN 1466-447X

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Abstract

This study assessed children’s physical activity (PA) levels derived from wrist-worn GENEActiv and hip-worn ActiGraph GT3X+ accelerometers and examined the comparability of PA levels between the two devices throughout the segmented week. One hundred twenty nine 9-10 year old children (79 girls) wore a GENEActiv (GAwrist) and ActiGraph GT3X+ (AGhip) accelerometer on the left wrist and right hip respectively for seven days. Mean minutes of light PA (LPA) and moderate-to-vigorous PA (MVPA) per weekday (whole-day, before-school, school and after-school) and weekend day (whole-day, morning and afternoon-evening) segments were calculated, and expressed as percentage of segment time. Repeated measures ANOVA examined differences in LPA and MVPA between GAwrist and AGhip for each time segment. Bland–Altman plots assessed between-device agreement for LPA and MVPA for whole weekday and whole weekend day segments. Correlations between GAwrist and AGhip were weak for LPA (r=0.18-0.28), but strong for MVPA (r=0.80-0.86). LPA and MVPA levels during all weekday and weekend day segments were significantly higher for GAwrist than AGhip (p<0.001). The largest inter-device percent difference of 26% was observed in LPA during the school day segment. Our data suggest that correction factors are needed to improve raw PA level comparability between GAwrist and AGhip.

Item Type: Article
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sports Sciences on 14th November 2016, available online: http://www.tandfonline.com/10.1080/02640414.2016.1255347
Uncontrolled Keywords: 1106 Human Movement And Sports Science, 1302 Curriculum And Pedagogy
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Sport & Exercise Sciences
Publisher: Taylor & Francis
Date Deposited: 31 Oct 2016 10:49
Last Modified: 11 Sep 2017 01:00
DOI or Identification number: 10.1080/02640414.2016.1255347
URI: http://researchonline.ljmu.ac.uk/id/eprint/4695

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