A method for the measurement of cardiac function during swimming exercise and the method for the three dimensional (3D) analysis of muscle structure of the thigh part were developed. 2D echography is utilized for the former method. Equipment and ultrasonic probe are modified for the measurement in the water. Swim-mill was used for the exercise and the cardiac functions were measured by the change in the transverse area of LV between diastole and systole. Ergometer exercise was also performed on the same subject with the same load as the swimming for the comparison of the change of the response between these exercises. The latter method was performed for the reconstruction of 3D image of muscles structure by a noninavasive way.
　3D image of the muscles was reconstructed from the MRI using a computer graphics system. After some experiences, it was revealed that these 3D images were effective to understand their shapes and relative locations of each muscle. And the change in the volume of each muscles was also measured quantitatively by this method.

DESCENTE SPORTS SCIENCE Vol.10/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE