小学生における肥満傾向増加の要因に関する研究

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The prevalence ratio of obese children (weight≧120% of standard weight) is rising in elementary schools in Japan. The present study was designed to examine what causes obesity to school children. Meanwhile, we have already examined seasonality in body weight of 430 elementary school children, who lived in Tokyo and Nagasaki. Body weight was measured monthly for six years (excluding August), and analyzed by Census Method II (X-11). A typical pattern of the seasonal variation in body weight observed among Japanese children is the increase in fall and/or winter and the decrease in summer. However, atypical variations were found among the obese children, showing increases in summer. Approximately 90% of the children in both sexes showed the typical pattern of the seasonal variations; low in summer and high in fall, winter, and/or early spring. On the other hand, weight gain in summer (July to September) was exclusively observed among the obese children. In 1996, at one elementary school in Tokyo, we measured stature, body weight, sitting height, west and hip circumferences and skinfold thickness on 204 children (about 95% of all children in the school) before and after summer holidays. At the same time of the second measurement (after summer holidays), children were reported how they spent their holidays. A possible explanation to this weight gain in summer seemed to be the continuous use of air conditioner with less active exercise and plenty of beverages and calorie-rich food, which could disturb the rythm of seasonal weight changes and might cause obesity to children.
東京大学の論文
1997-12-12

小学生における肥満傾向増加の要因に関する研究

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