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Wear Compliance and Activity in Children Wearing Wrist and Hip-Mounted Accelerometers.

Fairclough, SJ and Noonan, RJ and Rowlands, AV and van Hees, V and Knowles, ZR and Boddy, LM (2016) Wear Compliance and Activity in Children Wearing Wrist and Hip-Mounted Accelerometers. Medicine & Science in Sport & Exercise, 48 (2). pp. 245-253. ISSN 0195-9131

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GA vs AG raw compliance PA paper MSSE REVISION CLEAN[1].pdf - Accepted Version

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Abstract

PURPOSE: This study aimed to (i) explore children's compliance to wearing wrist and hip-mounted accelerometers, (ii) compare children's physical activity (PA) derived from wrist and hip raw accelerations, and (iii) examine differences in raw and counts PA measured by hip-worn accelerometry. METHODS: One hundred and twenty nine 9-10 y old children wore a wrist-mounted GENEActiv accelerometer (GAwrist) and a hip-mounted ActiGraph GT3X+ accelerometer (AGhip) for 7 d. Both devices measured raw accelerations and the AGhip also provided counts-based data. RESULTS: More children wore the GAwrist than the AGhip regardless of wear time criteria applied (p<.001 - .035). Raw data signal vector magnitude (SVM; r = .68), moderate PA (MPA; r = .81), vigorous PA (VPA; r = .85), and moderate-to-vigorous PA (MVPA; r = .83) were strongly associated between devices (p<.001). GAwrist SVM (p = .001), MPA (p = .037), VPA (p = .002), and MVPA (p = .016) were significantly greater than AGhip. According to GAwrist raw data, 86.9% of children engaged in at least 60 min MVPA[BULLET OPERATOR]d, compared to 19% for AGhip. ActiGraph MPA (raw) was 42.00 ± 1.61 min[BULLET OPERATOR]d compared to 35.05 ± 0.99 min[BULLET OPERATOR]d (counts) (p=.02). Actigraph VPA was 7.59 ± 0.46 min[BULLET OPERATOR]d (raw) and 37.06 ± 1.85 min[BULLET OPERATOR]d (counts; p=.19). CONCLUSION: In children accelerometer wrist placement promotes superior compliance than the hip. Raw accelerations were significantly higher for GAwrist compared to AGhip, possibly due to placement location and technical differences between devices. AGhip PA calculated from raw accelerations and counts differed substantially, demonstrating that PA outcomes derived from cutpoints for raw output and counts cannot be directly compared.

Item Type: Article
Additional Information: This is a non-final version of an article published in final form in Medicine and Science in Sports and Exercise, v.48(2), pp.245-53.
Uncontrolled Keywords: 1106 Human Movement And Sports Science
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
R Medicine > RJ Pediatrics > RJ101 Child Health. Child health services
Divisions: Sport & Exercise Sciences
Publisher: American College of Sports Medicine
Related URLs:
Date Deposited: 21 Jan 2016 08:54
Last Modified: 15 Sep 2016 23:50
DOI or Identification number: 10.1249/MSS.0000000000000771
URI: http://researchonline.ljmu.ac.uk/id/eprint/2721

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