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Timing and intensity of physical activity and late sleeping habits among children in Japan

Yusuke Matsuyama1, Aya Isumi1,2, Satomi Doi1,2

  • 1Department of Global Health Promotion, Tokyo Medical and Dental University, Tokyo, Japan.

Frontiers in Pediatrics
|September 30, 2022
PubMed

Insights

Light-intensity physical activity (PA) before school may help children develop earlier bedtime habits. Total daily PA was not linked to preventing late sleeping patterns in Japanese children.

Area of Science:

  • Pediatrics
  • Sleep Science
  • Exercise Physiology

Background:

  • Limited understanding exists regarding the optimal timing and intensity of physical activity (PA) for preventing late sleeping habits in children.
  • Investigating the relationship between PA patterns and sleep timing is crucial for child health.

Purpose of the Study:

  • To examine the association between the timing and intensity of physical activity and late sleeping habits in Japanese children.
  • To identify specific PA parameters that may influence children's bedtime.

Main Methods:

  • A population-based study involving fourth and eighth graders measured daily PA using accelerometers over seven days.
  • Late sleeping habits were assessed via questionnaires, defining bedtime as after 10 p.m. for fourth graders and 11 p.m. for eighth graders.
  • Poisson regression analysis was employed, adjusting for various demographic and lifestyle factors.

Main Results:

  • Total physical activity was not significantly associated with late sleeping habits.
  • Light-intensity physical activity performed before school showed a protective association with late sleeping habits (Prevalence Ratio: 0.82, 95% CI: 0.68, 0.99).
  • Physical activity during school hours or after school was not linked to sleep timing.

Conclusions:

  • Light-intensity physical activity before school may play a role in promoting earlier bedtimes for children.
  • Targeting morning light-intensity PA could be a strategy to improve sleep habits in pediatric populations.
Abstract

Keywords:
accelerometerchildphysical activityschoolsleep

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