A Study on Throwing Technique of Judo

-On Kamae, Kuzushi, Thukuri and Kake from the viewpoint of force components of foot-

Abstract

The purpose of this study was to clarify the characteristics of the basic Movement of Judo and the Throwing. Technique of Judo top players.
We used the force platforms to investigate the mechanics of Kamae, Kuzushi and step-in motion during the Throwing Techniques. .16mm cine camera was corresponded with the records of the force Components of foot. (We used as shown in Fig.1) The subjects for this study were 6 top atheletes on Judo, (including the 3 national team members) 20 to 21 years of age,8 to 12 years of experience and 3 to 4 dan degree.
The results may be summarized as follows;
(1) In all Kamae, we have the well-balanced force in right and left toward outside direction. Except Kamae of Shizen-hontai and Jigo-hontai, we have the well-balanced force in back and forward. Then the weight of the subject was divided well in right and left.
(2) In Kuzushi of the forward direction, we found the large force toward perpendicular direction and the movement of the body in the side and back direction. When Uke was unbalanced, there wasn't almost the force in back and forward direction and the weight of subject added to the foot toward unbalanced side and the posture of the subject was unbalanced.
(3) In Throwing Techniques, when the subject stepped in, we found the wellbalanced force in right and left.
Then the posture of the subject was kept.
At this time, we found the large force in the supporting leg in the perpendicular direction.
And, when the subject stepped in, we found the shock in each direction that keep the posture of the subject.