抄録
Recently martial arts have been much accounted of in junior and senior high schools, and are now holding an important position in the regular curriculum of physical education. On the other hand, injury accidents have increased in the practice of martial arts, especially in judo.
There may be several reasons for the accidents in judo and hard mats in judo halls seem to be one of the factors. If the mats are suitably hard, it will be possible for students to do their positive exercises mentally and to improve their skills in judo remarkably.
So we have examined the condition of mats in exercise halls of public junior and senior high school in Ishikawa Prefecture, and also asked instructors' opinions about mats, in order to know the appropriate hardness of mats, which will prevent accidents to acquire skills of judo.
This is the research about the strength of shock by ukemi under various conditions of mats, as one step to find out the suitable hardness of mats for judo.
