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Average acceleration and intensity gradient of primary school children and associations with indicators of health and wellbeing

Fairclough, SJ, Taylor, S, Rowlands, AV, Boddy, LM and Noonan, RJ Average acceleration and intensity gradient of primary school children and associations with indicators of health and wellbeing. Journal of Sports Sciences. ISSN 0264-0414 (Accepted)

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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. We examined hypothesised between-group PA differences in AvAcc and IG, and their associations with health and wellbeing indicators in children. ActiGraph GT9X wrist accelerometers were worn for 24-h·d−1 over seven days 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 (VO2peak), Metabolic Syndrome risk (MetS score), and wellbeing 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 (r=0.96), while moderate correlations were observed between IG and MVPA (r=0.50) and AvAcc (r=0.54). IG was significantly associated with health indicators, independent of AvAcc (p<.001). AvAcc was associated with wellbeing, independent of IG (p<.05). IG was significantly associated with WHtR (p<.01) and MetS score (p<.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: 1106 Human Movement and Sports Sciences, 1302 Curriculum and Pedagogy
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
R Medicine > RJ Pediatrics > RJ101 Child Health. Child health services
Divisions: Sport & Exercise Sciences
Publisher: Taylor & Francis
Date Deposited: 23 May 2019 08:36
Last Modified: 23 May 2019 08:45
URI: http://researchonline.ljmu.ac.uk/id/eprint/10752

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