The relationship between the strength (or duration) of physical exercise and a measure of mathematical ability (the calculating score) was examined. verified that the calculating score in the case of exercise (80W, 10minutes) was higher than that in the case of no exercise. It was found that the calculating score went up when the strength of physical exercise was modest (physical exercise of 5, 10 and 15 minutes), but the score went down when the strength was excessive. Next the relationship between the duration of physical exercise and the calculating score was investigated. It was shown that the strength of five minutes of exercise, where the calculating score became highest, was stronger than that of ten or fifteen minutes of exercise. The relationship between the heart rate and the calculating score was also shown.
