Background：In recent Japan, the sleep situations of children are worried about. As one background of such a problem, the screen thyme of children increase is regarded as uneasiness. Therefore, the practices of “no media” which limits screen time are spreading all over the country.
Objective：The purpose of this study was to inspect the effects of the “no-media” practice in junior high school.
Methods：Subjects were 672 children at a public junior high school in Shizuoka. All investigations were carried out on control day and practice period in October 2014. The sleep situation and subjective symptoms of fatigue were measured in this survey.
Results：Subjects were early to bed and early to rise. There were also few shortage and issues of sleep. Additionally, they had few subjective symptoms of fatigue and Internet addiction tendency. Furthermore, as a result of having inspected the “no media” practice, the bed duration was significantly earlier and sleep time was also significantly longer in practice period. The subjective symptoms of fatigue in practice period were decreased. In this study, the sleep situations and subjective symptoms of fatigue by the difference of the challenge item in this practice were also analyzed. As a result, in the group which challenged the practice of “no media”, it was shown that the sleep situation was improved and tiredness was decreased.
Conclusion：From the above facts, we reached the conclusion that the “no media” practice analyzed in this study is effective in children's health.
