京都市内小中高校生の体力, 運動能力の統計的分析

第3編体格, 体力, 運動能力の相互関係

抄録

Among the data on physical fitness (records of side step test, vertical jump, back strength, grip strength, trunk extention, trunk flexion and modified Harvard Step Test) and motor ability (record of 50m dash, running broad jump, ball throw, chinning and endurance running) of school children in Kyoto City, those for children of 10, years old were analysed to reveal the interrelations among body build, physical fitness and motor ability. 1) The correlation matrix among variables concerning body build, physical fitness and motor ability, 2) the multiple regression equation of each variable concerning physical fitness and motor ability on variables concerning body build, 3) the multiple regression equation of each variable concerning motor ability on variables concerning body build and physical fitness, 4) the canonical correlations between body build and physical fitness, between body build and motor ability and between physical fitness and motor ability were calculated. The results were as follows.
1) Any of correlations and multiple correlations calculated among variables concerning body build, physical fitness and motor ability was not very large, even though most of them were statistically significant at 1% level. Besides, it was found on boys and girls of every age that there were more than two significant canonical correlations between body build and physical fitness, between body build and motor ability and between physical fitness and motor ability, but even the maximum canonical correlation was not necessarily large.
The above findings indicate that the ability which is summarized as physical fitness or motor ability consists of various abilities which are relatively independent each other, and accordingly none of the relations between body build and physical fitness, between body build and motor ability and between physical fitness and motor ability is not represented by a simple relation between two linear combinations of variables.
2) The multiple regression equations calculated in this study may make it possible to estimate how each aspect of body build is contributing to each aspect of physical fitness and motor ability and how each aspect of body build and physical fitness is contrbuting to each aspect of motor ability. But in these estimations, it must be always kept in mind that the multiple correlation coefficients were not necessarily very large in every case.
3) Relatively large differences by age and sex were found on interrelations among variables concerning body build, physical fitness and motor ability. This fact probably indicates that various aspects of body build, physical fitness and motor ability do not necessarily grow or develope at the same rate.