A Preliminary Study of the Relationship between Physiques and Physical Activity in Children

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  • 男子児童における体格と身体活動量との関連について
  • ダンシ ジドウ ニオケル タイカク ト シンタイ カツドウリョウ ト ノ カンレン ニツイテ

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Abstract

PURPOSE: The purpose of this study was to provide preliminary descriptive epidemiology data representing the relationship between physiques and accelerometer- determined physical activity in children. SUBJECTS: Seventeen primary school children were recruited (six 4th- grade boys, seven 5th- grade boys, four 6th- grade boys). METHODS: A uni- axial accelerometer (Lifecorder) was worn for seven consecutive days under free living conditions. Statistical analyses compared mean physical activity parameters (Total energy expenditure, physical activity related- energy expenditure, physical activity related- energy expenditure per weight or allometric-weight, steps per day) between obesity indices. Mean physical activity parameters were also compared between weekdays versus weekend days. RESULTS: 8 lean subjects and 9 normal- weight subjects participated in this study, and there were no obese subjects. No significant deferences between lean and normal- weight subjects regarding physical activity parameters were observed. Comparing between weekdays and weekend days, all weekdays physical activity parameter were higher than weekend days in both lean and normal- weight children (p<0.01). Body weight had significant correlation with adjusted physical activity- related energy expenditure (negative, p<0.01), but no significant correlations between body weight and any physical activity parameters were observed on weekend days. CONCLUSIONS: Although the results of this study are generalizable to other settings or populations is unclear, these results indicate that the effective strategy to prevent childhood overweight and obesity may be school- based program for promoting physical activity.

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