The relationship between sleep habits, lifestyle factors, and achieving guideline-recommended physical activity levels in ten-to-fourteen-year-old Japanese children: A cross-sectional study

Abstract

The current focus of meeting the physical activity guidelines for children and young people include preventing conditions such as high blood cholesterol, high blood pressure, metabolic syndrome, obesity, low bone density, depression, and injuries. However, the relationship between sleep habits and meeting physical activity guidelines is still unclear. This study aimed to assess this relationship among fifth- to eighth-grade (ages 10–14) Japanese children. This cross-sectional study included 3,123 children (boys: 1,558, girls: 1,565, mean age: 12.5 ± 1.2 years). Questionnaires were used to assess parameters such as moderate-to-vigorous physical activity per day, school and weekend night sleep durations, social jetlag, daytime sleepiness, napping, screen time, and breakfast intake. Participants were divided into an achievement and a non-achievement group depending on their physical activity guideline achievement status (i.e., whether they met the children’s physical activity guideline of 60 min or more of moderate-to-vigorous physical activity per day). Then, to determine the sleep habits in relation to the children’s achievement of guideline-recommended physical activity levels, multivariate logistic regression analyses were conducted. In fifth- and sixth-grade (ages 10–12) boys, an inverse association was observed between physical activity guideline achievement and daytime sleepiness. In seventh- and eighth-grade (ages 12–14) boys, physical activity guideline achievement was inversely associated with social jetlag and skipping breakfast. Additionally, in seventh- and eighth-grade girls, physical activity guideline achievement was inversely associated with inappropriate sleep duration on weekends and screen time. These results suggest that meeting the physical activity guideline is related to favorable sleep habits in Japanese children. However, their relevance may differ by school type and gender.

Determinants of Sleepiness among Pupils in Kanto District of Japan

“…Consistent with the current result, slee-piness has been reported to be associated with athletes who are engaged in excessive physical activity [24] [25] [26]. An association between lower physical activity and daytime sleepiness was reported in 5 th -and 6 th -grade (ages 10 -12) boys in Japan; however, this study did not assess the association between higher physical activity and sleepiness [27].…”

Associations of social jetlag with physical activity and sedentary behaviour in children and adolescents: A systematic review and meta‐analysis

“…Second, there was no consensus on the threshold implying having social jetlag or not and its severity. Some studies have reported social jetlag as a continuous variable, while others have defined it as 2 h or more (Johnson et al, 2020) or more than 1 h of social jetlag (Aoki et al, 2020; Lan et al, 2020). It is also plausible that the relationship between social jetlag and physical activity is not linear.…”

Neighborhood-level socioeconomic factors moderate the association between physical activity and relative age effect: a cross-sectional survey study with Japanese adolescents

“…We also asked students, “How often do you engage in physical activity per week?” and “How long do you engage in physical activity per day on average?”, regarding moderate physical activity (MPA) and vigorous physical activity (VPA) [ 22 ]. Based on a previous study, moderate to vigorous physical activity (MVPA) per day was calculated as follows [ 23 ].…”

“…", regarding moderate physical activity (MPA) and vigorous physical activity (VPA) [22]. Based on a previous study, moderate to vigorous physical activity (MVPA) per day was calculated as follows [23].…”

“…22 Graduate School of Environmental Studies, Tohoku University, Sendai, Japan. 23 Faculty of Health and Sports Science, Doshisha University, Kyotanabe, Japan. • support for research data, including large and complex data types • gold Open Access which fosters wider collaboration and increased citations maximum visibility for your research: over 100M website views per year…”