Abstract
The purpose of this paper is to establish the estimating method of the shock absorbing effect of judojyo floor. On inquiring survey of athletes' sense of shock absorbing effect of actural judojyo floors, it was certified that athletes had been equally concious of differences on shock absorbing effect in actural judojyo floors. Then characteristic examples of judojyo floors could be selected from the viewpoint of athletes sense of shock absorbing effect. Then the characteristics of dynamic loads applied to judojyo floors by athletes was defined on experimental studies. And the dynamic loads applied to judojyo floors by athletes could be converted into loads by mechanical loading system which consisted of a free dropping weight and rubber spring on experimental studies.
