Abstract
The purpose of this paper is to establish the estimating method of the shock absorbing effect of judojyo floors. The apparatus consists of a free dropping weight, a rubber spring, a load cell, an displacement meter, a dynamic strain meter, an electro-magnetic osciilograph and so on. Seven characteristic floors from the view point of athletes' sense of the shock absorbing effect were surveyed by the apparatus. From the results of measurement by the apparatus, the physical characteristics of floors could be extracted concerning to the athletes' sense. From the results of corresponding between the athletes' sense and physical characteristics of floors, the estimating method and the most suitable range of the value of the value of the shock absorbing effect of judojyo floors were presented.
