Abstract
Background:
The aim of this study was to examine in detail levels and patterns of physical activity in preschool children and the effects of gender and BMI on this activity.
Methods:
Two hundred and fifty-three children aged 5 y participating in the Copenhagen Prospective Studies on Asthma in Childhood wore an accelerometer day and night over a 4-wk period. The main outcome measure was level of physical activity using the raw data. A secondary measure was time spent in moderate to vigorous physical activity (MVPA). A Fourier series analysis was applied to study in detail patterns over time.
Results:
Activity profiles throughout the year were unique for each sex, with boys being overall more active than girls except for winter months. Preschool children also showed distinct patterns of physical activity during weekdays as compared with weekends and were most active during weekdays. Preschool children in the highest tertile of BMI had a flat yearly activity profile and tended to be less active as compared with those in the lowest tertile.
Conclusion:
Preschool children showed significant gender differences in physical activity, with distinct patterns throughout the year as well as between weekdays and weekends. A high BMI tended to be associated with lower levels of physical activity.
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Acknowledgements
We thank the children and parents participating in the Copenhagen Prospective Studies on Asthma in Childhood (COPSAC) cohort as well as the COPSAC study team. We also thank senior statisticians Christian Bressen Pipper and Florent Baty, as well as technical assistant Richard Flaaten.
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Brasholt, M., Chawes, B., Kreiner-Møller, E. et al. Objective assessment of levels and patterns of physical activity in preschool children. Pediatr Res 74, 333–338 (2013). https://doi.org/10.1038/pr.2013.99
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DOI: https://doi.org/10.1038/pr.2013.99
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