2012 年 45 巻 p. 32-36
The purpose of this study was to examine how much changes of habitual exercise affected exercise ability, and in this survey 124 university male students took part. They were asked to answer a questionnaire of six items associated with their exercise and life-style, and based upon the frequency of their habitual exercise and time to exercise. The subjects were divided into two groups ; one is an active group (A) and the other is a non-active group (N), whose information was gotten from the result of the questionnaire. Furthermore, based on results of the same questionnaire survey one year later, a subject who was A in first year and belonged to A in second year classified into AA (n=13), first was A and second was N assorted into AN (n=13), first was N and second was A divided in NA (n=10), first was N and second was N assigned to NN (n=88). Moreover, the change of results of the first year and the second year was compared on physique (height, weight, percent of body fat) and fitness level (grip strength, sit-ups, sitting trunk flexion, side step, 20m shuttle run test, 12 minute distance run). Measurement results of physique were similar in comparison with standard values of young Japanese male. In addition, obesity was not shown in four groups. However, body weight in second year trended to increase more than that in first year in each group, and % of body fat increased significantly in every group (p<0.05). This result suggested that increase of fat weight caused for rise of body weight. As a result of fitness test, AA and AN maintained a physical fitness level. Though habitual exercise was reformed in NA, there were no significant improvement in results of fitness test. Significantly degradation was showed in four items except sit-ups and 12 minute distance run in NN (p<0.05). These results indicate that continuation of habitual exercise effective in maintenance of physical fitness level, but fitness level was not varied immediately even if a habitual exercise changes.