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Physical activity, sedentary time, and fatness in a biethnic sample of young children

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posted on 05.10.2018 by Paul J. Collings, Soren Brage, Daniel D. Bingham, Silvia Costa, Jane West, Rosie R.C. McEachan, John Wright, Sally E. Barber
Purpose: This study aimed to investigate associations of objectively measured physical activity (PA) and sedentary time with adiposity in a predominantly biethnic (South Asian and White British) sample of young children. Methods: The sample included 333 children age 11 months to 5 yr who provided 526 cross-sectional observations for PA and body composition. Total PA volume (vector magnitude counts per minute), daily time at multiple intensity levels (the cumulative time in activity 9500, 91000, 91500, I, 96000 counts per minute), and time spent sedentary (G820 counts per minute), in light PA (820–3907 counts per minute) and in moderate-to-vigorous PA (Q3908 counts per minute) were estimated with triaxial accelerometry. Indicators of adiposity included body mass index, waist circumference, and the sum of subscapular and triceps skinfold thicknesses. Statistical analyses were performed using multilevel regression and isotemporal substitution models adjusted for confounders. Effect modification by ethnicity was examined. Results: There was no evidence for effect modification by ethnicity (P interaction Q 0.13). In the whole sample, the accumulated time spent above 3500 counts per minute (i.e., high light-intensity PA) was inversely associated with the sum of skinfolds (A = j0.60 mm, 95% confidence interval [CI] = j1.19 to j0.021, per 20 minIdj1), and the magnitude of association increased dose dependently with PA intensity (peaking for time spent 96000 counts per minute = j1.57 mm, 95% CI = j3.01 to j0.12, per 20 minIdj1). The substitution of 20 minIdj1 of sedentary time with moderate-to-vigorous PA was associated with a lower sum of skinfolds (j0.77 mm, 95% CI = j1.46 to j0.084). Conclusions: High light-intensity PA appears to be beneficial for body composition in young South Asian and White British children, but higher-intensity PA is more advantageous.

Funding

Authors P. J. C., D. D. B., J. We., R. R. C. M., J. Wr., and S. E. B. are part of the Healthy Children, Healthy Families Theme of the NIHR CLAHRC Yorkshire and the Humber. Author S. B. is supported by the UK Medical Research Council (grant no. MC_UU_12015/3).

History

School

  • Sport, Exercise and Health Sciences

Published in

Medicine & Science in Sports & Exercise

Volume

49

Issue

5

Pages

930 - 938

Citation

COLLINGS, P.J. ... et al., 2017. Physical activity, sedentary time, and fatness in a biethnic sample of young children. Medicine & Science in Sports & Exercise, 49(5), pp. 930-938.

Publisher

© The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American College of Sports Medicine.

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2017

Notes

This is an Open Access Article. It is published by Wolters Kluwer Health under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

ISSN

0195-9131

Language

en

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