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

Boddy, Lynne M and Cunningham, Conor and Fairclough, Stuart J. and Dagger, Rebecca. M. and Murphy, Marie H. and Breslin, Gavin and Foweather, Lawrence and Graves, Lee E. F. and Hopkins, Nicola D. and Stratton, Gareth (2017) Individual calibration of accelerometers in children and their health-related implications. Journal of Sports Sciences. ISSN 0264-0414

PA Cutpoints and Activity Health Relationships Accepted Version.pdf - Accepted Version

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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
Additional Information and Comments: This is an Accepted Manuscript of an article published by Taylor & Francis in the Journal of Sports Sciences, available online:
Faculty / Department: Faculty of Science > School of Health Sciences
Depositing User: Matthew Adams
Date Deposited: 07 Sep 2017 13:54
Last Modified: 05 Apr 2019 09:55

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