Proportion of Japanese primary school children meeting recommendations for 24-h movement guidelines and associations with weight status - 08/06/20

Doi : 10.1016/j.orcp.2020.05.003

Chiaki Tanaka ^a,⁎ , Mark S. Tremblay ^b , Masayuki Okuda ^c , Shigeru Inoue ^d , Shigeho Tanaka ^e
^a College of Health and Welfare, J. F. Oberlin University, 3758 Tokiwamachi, Machida, Tokyo 194-0294, Japan
^b Healthy Active Living and Obesity Research Group, Children’s Hospital of Eastern Ontario Research Institute, Department of Pediatrics, University of Ottawa, 401 Smyth Road, Ottawa, ON K1H 8L1, Canada
^c Department of Environmental Medicine, Graduate School of Science and Engineering, Yamaguchi University, 1-1-1 Minamikogushi Ube, Yamaguchi 755-8505, Japan
^d Department of Preventive Medicine and Public Health, Tokyo Medical University, 6-1-1 Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan
^e Faculty of Nutrition, Kagawa Nutrition University, 3-9-21 Chiyoda, Sakado, Saitama 350-0288, Japan

^⁎Corresponding author at: College of Health and Welfare, J. F. Oberlin University, 3758 Tokiwamachi, Machida, Tokyo 194-0294, Japan.College of Health and WelfareJ. F. Oberlin University3758 TokiwamachiMachidaTokyo194-0294Japan

Sous presse. Épreuves corrigées par l'auteur. Disponible en ligne depuis le Monday 08 June 2020

Abstract

Background

24-h movement guidelines were recently developed to improve both the present and future health of children. The purpose of the present study was to evaluate adherence to the three recommendations strongly associated with health in 24-h movement guidelines and their relationship with weight status (overweight/obesity or underweight) in Japanese primary school children.

Methods

This cross-sectional study was based on 902 children. Weight status according to measured body mass index (BMI) was classified by the WHO growth reference. Meeting the 24-h movement guidelines was defined as: 9–11 h/night of sleep, ≤2 h/day of screen time, and at least 60 min/day of moderate-to-vigorous physical activity (MVPA).

Results

The prevalence of children meeting the all three recommendations was 10.5% and 13.2% met none of the three recommendations. Children meeting all three behaviors recommendation, screen time and MVPA or sleep recommendations, or only screen time recommendation had lower odds ratios adjusted for age, gender and socioeconomic status of each school for overweight/obesity compared to children meeting none of the 3 recommendations.

Conclusions

The screen time recommendation or combinations including screen time recommendation were associated with overweight/obesity. On the other hand, none of the recommendations was associated with underweight.

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Abbreviations : BMI, MVPA, METs, SES, SD

Keywords : Physical activity, Sedentary behavior, Sleep, Body weight, Children