2019 年 19 巻 p. 30-38
This study aimed to clarify individual differences in the amount of physical activity and differences between units in physical education classes in junior high school girls. The participants were 42 girls in the second grade of junior high school and 43 in the third grade. The step counts and exercise intensity achieved in classes involving long distance running, kendo, basketball, volleyball, mat movement, and dance were recorded. We conducted the Bartlett’s test and a test of equidistribution of the two groups in order to compare the individual differences in the amount of physical activity between units. Findings revealed that dance, volleyball, and basketball had significantly higher individual differences in step counts as compared to the other units, and mat movement and long distance running had significantly smaller individual differences in the same. Individual differences in exercise intensity were significantly larger in dance, basketball, kendo, and long distance running, and they were significantly smaller in mat movement. A one-way analysis of variance and multiple comparison test to clarify the differences between the units of exercise in terms of the exercise intensity and step count revealed that long distance running involved significantly more intensity than the other units did. Further, the exercise intensity of long distance running and basketball was significantly higher than that of mat movement and kendo. The present study revealed that physical education classes for junior high school girls involve individual differences in the amount of physical activity based on the unit, and that some units do not elicit the optimal amount of physical activity.