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Updated: Jun 29, 2026

Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood
Published on: October 2, 2019
Bedtime activities, sleep environment, and sleep/wake patterns of Japanese elementary school children
Yasunori Oka1, Shuhei Suzuki, Yuich Inoue
1Japan Somnology Center, Neuropsychiatric Research Institute, Tokyo, Japan. oka@somnology.com
Insights
Screen time and late after-school activities disrupt children's sleep. Limiting television, video games, and internet use before bed, and ensuring timely return from activities, promotes healthier sleep patterns in elementary school children.
Area of Science:
- Pediatrics
- Sleep Medicine
- Child Psychology
Background:
- Childhood sleep patterns are crucial for development and well-being.
- Modern lifestyles present numerous challenges to establishing healthy sleep habits in children.
- Understanding the influence of bedtime routines and sleep environments is essential for pediatric health.
Purpose of the Study:
- To investigate the impact of bedtime activities and sleep environment on sleep/wake patterns in elementary school children.
- To identify specific activities and environmental factors negatively affecting children's sleep.
- To provide evidence-based recommendations for healthcare practitioners and parents.
Main Methods:
- A cross-sectional study involving 509 elementary school children (ages 6-12).
- Assessment of bedtime activities, sleep environment, and sleep/wake patterns.
- Statistical analysis to determine the relationship between various factors and sleep parameters.
Main Results:
- Television viewing, video games, and internet use were associated with negative impacts on sleep/wake parameters.
- The presence of a television or video game in the child's bedroom correlated with increased pre-bedtime activity.
- Returning home after 8 p.m. from after-school activities negatively affected sleep patterns.
Conclusions:
- Screen time (television, video games, internet) before bed can significantly disrupt children's sleep.
- Late-finishing after-school activities also contribute to disturbed sleep patterns.
- Healthcare providers should counsel families on managing screen time and after-school schedules to optimize child sleep health.
Abstract:
Bedtime activities, sleep environment, and their impact on sleep/wake patterns were assessed in 509 elementary school children (6-12 years of age; 252 males and 257 females). Television viewing, playing video games, and surfing the Internet had negative impact on sleep/wake parameters. Moreover, presence of a television set or video game in the child's bedroom increased their activity before bedtime. Time to return home later than 8 p.m. from after-school activity also had a negative impact on sleep/wake patterns. Health care practitioners should be aware of the potential negative impact of television, video games, and the Internet before bedtime, and also the possibility that late after-school activity can disturb sleep/wake patterns.
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