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Establishing Raw Acceleration Thresholds to Classify Sedentary and Stationary Behaviour in Children

Hurter, L, Fairclough, SJ, Knowles, ZR, Porcellato, LA, Cooper-Ryan, A and Boddy, LM (2018) Establishing Raw Acceleration Thresholds to Classify Sedentary and Stationary Behaviour in Children. Children, 5 (12). ISSN 0273-9615

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Open Access URL: https://doi.org/10.3390/children5120172 (Published version)

Abstract

This study aimed to: (1) compare acceleration output between ActiGraph (AG) hip and wrist monitors and GENEActiv (GA) wrist monitors; (2) identify raw acceleration sedentary and stationary thresholds for the two brands and placements; and (3) validate the thresholds during a free-living period. Twenty-seven from 9- to 10-year-old children wore AG accelerometers on the right hip, dominant- and non-dominant wrists, GA accelerometers on both wrists, and an activPAL on the thigh, while completing seven sedentary and light-intensity physical activities, followed by 10 minutes of school recess. In a subsequent study, 21 children wore AG and GA wrist monitors and activPAL for two days of free-living. The main effects of activity and brand and a significant activity × brand × placement interaction were observed (all p < 0.0001). Output from the AG hip was lower than the AG wrist monitors (both p < 0.0001). Receiver operating characteristic (ROC) curves established AG sedentary thresholds of 32.6 mg for the hip, 55.6 mg and 48.1 mg for dominant and non-dominant wrists respectively. GA wrist thresholds were 56.5 mg (dominant) and 51.6 mg (non-dominant). Similar thresholds were observed for stationary behaviours. The AG non-dominant threshold came closest to achieving equivalency with activPAL during free-living.

Item Type: Article
Uncontrolled Keywords: 1117 Public Health And Health Services
Subjects: R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Public Health Institute
Sport & Exercise Sciences
Publisher: MDPI
Date Deposited: 20 Dec 2018 16:05
Last Modified: 21 Dec 2018 15:57
DOI or Identification number: 10.3390/children5120172
URI: http://researchonline.ljmu.ac.uk/id/eprint/9860

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