Study on related factors and intervention program to enhance amount of physical activity of children in sub-tropical island areas

用加速度计检测了亚热带岛屿地区(冲绳县)小学生夏季和冬季的体力活动量，并进行了比较。结果表明，冬季的体力活动水平(步数、运动量、总消耗量)均高于夏季。此外，有趣的是，在亚热带岛屿(石垣岛和宫古岛)的农村地区，发现女孩在公共假日期间的体育活动量明显高于城市地区。这些结果表明，亚热带岛屿地区儿童的体力活动更多地受到城乡特征的影响，而不是季节的影响。此外，为了增加儿童的体力活动，进行了一项干预认知计划，但没有显著效果。

The amounts of physical activity of elementary school-aged children in sub-tropical island areas(Okinawa Prefecture) in summer and winter were examined using accelerometers and compared. As a result, the levels of physical activity(number of steps, movement counts, total consumption) in winter were found higher than that of in summer. Furthermore, interestingly, the amounts of physical activity of girls during public holiday in rural area of sub-tropical islands(Ishigaki and Miyako) were discovered significantly higher than in urban area. These results showed that children's physical activity of sub-tropical island areas was affected more by urban-rural characteristics than by seasons. In addition, an intervention cognitive program was conducted in order to increase children's physical activity, but had no significant effect.