Fifty-one middle-aged men (35-53 years old) were studied before and after 3-4 months' physical training. Training was undertaken 3 times per week and was maintained 30 minutes per session. Bicycle ergometer exercise at 100 watt made before and after the physical training program.
　Results obtained were as follows;
　1. After the physical training, systolic and diastolic blood pressures at rest were significantly decreased. The reductions of systolic and diastolic blood pressures at rest after the training were correlated with those before the training.
　2. Heart rate and systolic blood pressure during exercise were significantly lower after the training, but no significant change was found in diastolic blood pressure.
　3. Relation between heart rate and systolic blood pressure during exercise after the training was not different from one before the training.
　4. The ratio of systolic blood pressure (SBP) to heart rate (HR) during exercise was not changed by the training, its value (SBP/HR) of each subject was almost the same between before and after the training.

DESCENTE SPORTS SCIENCE Vol.21/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE