Average acceleration and intensity gradient of primary school children and associations with indicators of health and well-being



Fairclough, Stuart J, Taylor, Sarah, Rowlands, Alex V, Boddy, Lynne M and Noonan, Robert J ORCID: 0000-0001-9575-5729
(2019) Average acceleration and intensity gradient of primary school children and associations with indicators of health and well-being. JOURNAL OF SPORTS SCIENCES, 37 (18). pp. 2159-2167.

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Abstract

Average acceleration (AvAcc) and intensity gradient (IG) have been proposed as standardised metrics describing physical activity (PA) volume and intensity, respectively. <i>We</i> examined hypothesised between-group PA differences in AvAcc and IG, and their associations with health and well-being indicators in children. ActiGraph GT9X wrist accelerometers were worn for 24-h·d<sup>-1</sup> over 7days by 145 children aged 9-10. Raw accelerations were averaged per 5-s epoch to represent AvAcc over 24-h. IG represented the relationship between log values for intensity and time. Moderate-to-vigorous PA (MVPA) was estimated using youth cutpoints. BMI z-scores, waist-to-height ratio (WHtR), peak oxygen uptake (VO<sub>2</sub>peak), Metabolic Syndrome risk (MetS score), and well-being were assessed cross-sectionally, and 8-weeks later. Hypothesised between-group differences were consistently observed for IG only (p < .001). AvAcc was strongly correlated with MVPA (<i>r</i> = 0.96), while moderate correlations were observed between IG and MVPA (<i>r</i> = 0.50) and AvAcc (<i>r</i> = 0.54). IG was significantly associated with health indicators, independent of AvAcc (<i>p</i> < .001). AvAcc was associated with well-being, independent of IG (<i>p</i> < .05). IG was significantly associated with WHtR (<i>p</i> < .01) and MetS score (<i>p</i> < .05) at 8-weeks follow-up. IG is sensitive as a gauge of PA intensity that is independent of total PA volume, and which relates to important health indicators in children.

Item Type: Article
Uncontrolled Keywords: Physical activity, standardised metrics, raw accelerations, GGIR, wrist, youth
Depositing User: Symplectic Admin
Date Deposited: 24 May 2019 11:18
Last Modified: 19 Jan 2023 00:43
DOI: 10.1080/02640414.2019.1624313
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3042343