Time of Polarization at the Physical Fitness Level in Children

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  • 子どもの体力に関する二極化出現時期
  • 子どもの体力に関する二極化出現時期--5歳時に両極にある集団の過去への追跡調査に基づいて
  • コドモ ノ タイリョク ニ カンスル ニキョクカ シュツゲン ジキ 5サイジ ニ リョウキョク ニ アル シュウダン ノ カコ エ ノ ツイセキ チョウサ ニ モトズイテ
  • - Based on the Follow-up Survey to the Past of the Group That Exists in Two Poles at Five-Years Old Time -
  • －5歳時に両極にある集団の過去への追跡調査に基づいて－

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This study aimed to examine the timing of polarization in the physical fitness levels of children. The study analyzed data obtained through a pursuit measurement of children, conducted over a period of three years. The subjects were 396 young children (201 boys and 195 girls) with standard physiques. We administered physical tests comprising seven types of exercises (grip strength, standing long jump, softball throw, 25-m run, side-step, upright hand standing time, and sitting trunk flexion) to understand the children’s physical fitness characteristics; the tests were conducted every November for three years from ages three to five. Finally, at the age of five, the subjects were divided into the upper-ranking group (25%) and the lower-ranking group (25%) on the basis of the results of the physical tests. Further, the differences between the two groups were evident for all the seven exercises in the first year itself. To conduct a statistical analysis of the data, a two-way ANOVA and multiple comparisons (Tukey’s HSD test) were employed. The analysis revealed a significant difference between the two groups for all the exercises. A significant interaction was found for all the exercises, excluding the 25-m run in the case of boys. The difference between the upper-ranking and lower-ranking groups was already apparent in all the exercises when the children were three years old. With the exception of the 25-m run, the differences between the groups were more significant between ages four and five.

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