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Fairclough, SJ, Taylor, S, Rowlands, AV, Boddy, LM and Noonan, RJ (2019) Average acceleration and intensity gradient of primary school children and associations with indicators of health and wellbeing. Journal of Sports Sciences. ISSN 0264-0414
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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 |
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| Additional Information: | This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sports Sciences on 01/06/2019, available online: http://www.tandfonline.com/10.1080/02640414.2019.1624313 |
| 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: | 04 Sep 2021 09:22 |
| DOI or ID number: | 10.1080/02640414.2019.1624313 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/10752 |
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