Research in Exercise Epidemiology
Online ISSN : 2434-2017
Print ISSN : 1347-5827
Original Article
Relationships between physical activity, screen time, and sleep duration and quality in children and adolescents: a cross-sectional study
Yuta Nemoto Yoshinori KitabatakeTakayo InayamaTakashi Arao
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JOURNAL FREE ACCESS

2019 Volume 21 Issue 1 Pages 28-37

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Abstract

Objective: Adequate sleep duration and quality play a key role in physical growth and development of children and adolescents. The purpose of this study was to identify the relationships between sleep duration and quality, physical activity, and screen time among children (aged 10-12) and adolescents (aged 13-15).

Methods: In 2007, a cross-sectional study enrolling 524 students was conducted in Tsuru, Yamanashi, Japan. We assessed sleep duration and quality as the dependent variable. Sleep duration was classified into ‘achieved recommendation’ and ‘not achieved recommendation’ according to the guideline (aged 9-13: 9-11 hours/day, aged 14-15: 8-10 hours/day). Physical activity (step count evaluated by accelerometer, the frequency of exercise or sport, and the frequency of active play) and screen time (the amount of time of television viewing and playing game and computer using) were included as independent variables. Logistic regression analysis adjusting for gender, age, school, after school activity, subjective busyness to assess the relationships between sleep and physical activity and screen time.

Results: Those who spent screen time for <2h/day were more likely to achieve the recommended sleep duration (Odds ratio [OR] = 1.39, 95% confidence interval [CI] = 1.041.86). In terms of sleep quality, high frequency of active play was significant related with high sleep quality compared with low frequency (OR = 2.0095% CI 1.372.92).

Conclusion: Our findings suggested that screen time is associated with sleep duration, whereas the frequency of active play is related with sleep quality.

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© 2019 Japanese Association of Exercise Epidemiology
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