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Individual calibration of accelerometers in children and their health-related implications

Boddy, LM and Cunningham, C and Fairclough, SJ and Murphy, MH and Breslin, G and Foweather, L and Dagger, RM and Graves, LE and Hopkins, ND and Stratton, G Individual calibration of accelerometers in children and their health-related implications. Journal of Sports Sciences. ISSN 0264-0414 (Accepted)

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Abstract

This study compared children’s physical activity (PA) levels, the prevalence of children meeting current guidelines of ≥60 minutes of daily moderate to vigorous PA (MVPA), and PA-health associations using individually calibrated (IC) and empirical accelerometer cutpoints. Data from 75 (n = 32 boys) 10-12 year old children were included in this study. Clustered cardiometabolic (CM) risk, directly measured cardiorespiratory fitness (CRF), anthropometric and 7 day accelerometer data were included within analysis. PA data were classified using Froude anchored IC, Evenson et al., 2008 (Ev) and Mackintosh et al., 2012 (Mack) cutpoints. The proportion of the cohort meeting ≥60mins MVPA/day ranged from 37%-56% depending on the cutpoints used. Reported PA differed significantly across the cutpoint sets. IC LPA and MPA were predictors of CRF (LPA: standardised β = 0.32, p = 0.002, MPA: standardised β = 0.27 p = 0.013). IC MPA also predicted BMI Z-score (standardised β = -0.35, p = 0.004). Ev VPA was a predictor of BMI Z-score (standardised β = -0.33, p = 0.012). Cutpoint choice has a substantial impact on reported PA levels though no significant associations with CM risk were observed. Froude IC cut points represent a promising approach towards classifying children’s PA data.

Item Type: Article
Uncontrolled Keywords: 1106 Human Movement And Sports Science, 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: 05 Sep 2017 09:33
Last Modified: 13 Sep 2017 12:41
URI: http://researchonline.ljmu.ac.uk/id/eprint/7033

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