Abstract
Until now, the relationship between output force distribution and muscular strength in human limbs has been discussed under the theoretical back ground of the coordination of bi-articular muscles and mono-articular muscles. The difference of approach by muscle coordinate system and approach by joint coordinate system was clarified. And, the approach by muscle coordinate system was advocated. In the present study, the details were examined for the application of this approach to the fields based on body mechanics such as sport or rehabilitation. The change of the output force distribution and muscular strength by two kinds of muscular training of leg extension and leg curl exercise were verified experimentally. The relationship between output force distribution and muscular strength under approach by muscle coordinate system was more clarified. The effect of exercise was verified by standing broad jump and standing vertical jump. This is sufficiently useful for the preparation of precise exercise menu or precise evaluation of exercise effect.
