Recently, it has been believed that appropriate physical training is beneficial to decrease the blood pressure of essential hypertension, although there are few evidences in experiment.
　In this study, thus, a new limbs plethysmograph has been developed to investigate hemodynamic change with physical training. The plethysmograph is length 95cm and diameter 30cm and it's function can enclose the air. The main feature of the plethysmograph is as follows. (1) The inside volume changes is represented by air pressure, because the both changes were rectilinearly correlated. (2) Because the change in whole limb volume can be recorded with changing air pressure, total limb blood flow is measured. The plethysmograph will be used to measure the change of resting limbs blood flow before and after physical training, so the accuracy of it's function should be confirmed.
　However, repeatedly testing, the plethysmograph has still some problems for accurate measurements of the blood flow. Therefore, the plethysmograph failed to measure the limb blood flow in the training study, while the possibility has be found.

DESCENTE SPORTS SCIENCE Vol.8/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE