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Individual calibration of accelerometers in children and their health-related 2 implications

Boddy, Lynne, Cuningham, Conor, Fairclough, Stuart, Murphy, MH, Breslin, Gavin, Foweather, Laurence, Rebecca, Dagger and Graves, Lee (2017) Individual calibration of accelerometers in children and their health-related 2 implications. Journal of Sport Sciences, 36 . [Journal article]

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URL: http://www.tandfonline.com/doi/full/10.1080/02640414.2017.1377842

DOI: 10.1080/02640414.2017.1377842

Abstract

This study compared children’s physical activity (PA) levels, the prevalence of children 73 meeting current guidelines of ≥60 minutes of daily moderate to vigorous PA (MVPA), and 74 PA-health associations using individually calibrated (IC) and empirical accelerometer 75 cutpoints. Data from 75 (n = 32 boys) 10-12 year old children were included in this study. 76 Clustered cardiometabolic (CM) risk, directly measured cardiorespiratory fitness (CRF), 77 anthropometric and 7 day accelerometer data were included within analysis. PA data were 78 classified using Froude anchored IC, Evenson et al., 2008 (Ev) and Mackintosh et al., 2012 79 (Mack) cutpoints. The proportion of the cohort meeting ≥60mins MVPA/day ranged from 80 37%-56% depending on the cutpoints used. Reported PA differed significantly across the 81 cutpoint sets. IC LPA and MPA were predictors of CRF (LPA: standardised β = 0.32, p = 82 0.002, MPA: standardised β = 0.27 p = 0.013). IC MPA also predicted BMI Z-score 83 (standardised β = -0.35, p = 0.004). Ev VPA was a predictor of BMI Z-score (standardised β 84 = -0.33, p = 0.012). Cutpoint choice has a substantial impact on reported PA levels though no 85 significant associations with CM risk were observed. Froude IC cut points represent a 86 promising approach towards classifying children’s PA data.

Item Type:Journal article
Keywords:physical activity, accelerometry, threshold, children
Faculties and Schools:Faculty of Life and Health Sciences > School of Sport
Faculty of Life and Health Sciences
Research Institutes and Groups:Sport and Exercise Sciences Research Institute
Sport and Exercise Sciences Research Institute > Centre for Sports Science and Sports Medicine
Sport and Exercise Sciences Research Institute > Centre for Physical Activity and Health
ID Code:38628
Deposited By: Professor Marie Murphy
Deposited On:19 Sep 2017 08:50
Last Modified:17 Oct 2017 16:31

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