Study on Mechanism of Injury Generation and Reduction Therapy

Study on Mechanism of Injury Generation and Reduction Therapy based on Judo forms caled as Kata

Takashi Watanabe
sugiura@shadan-nissei.or.jp / masa@jvb.co.jp
Japan Judo Therapist Association

The techniques of Hiza-gatame (knee lock) and Hara-gatame (stomach lock) called as Kime-no-Kata aim at a positioning of elbow joints to cause a dislocation. Here, the underlying mechanism for the dislocation theory and reduction theory were investigated from the aspects of Kansetsu-waza (joint techniques).
We examined the mechanisms focusing on the motion of body and the positioning of joints as well as power direction and its timing in relation to Judo-Seifuku therapy and verify the mechanism through Judo techniques in practice. Kime-no-Kata in Judo mainly consists of Atemi-waza (striking techniques) and Kansetsu-waza (joint techniques), and also includes Nage-waza (throwing techniques) and Katame-waza (grappling techniques). Their offensive and defensive techniques are essential for waza. These waza are able to verify the individual motion by actually reproducing the respective components. The techniques of Suriage (knee lock) and Tukkomi (stomach lock) aim to let the opponent loose balance utilizing the offensive force while keeping one’s own balance, resulting that direct and indirect forces are loaded on the opponent’s elbow joints. The force produced by Kansetsu-waza is able to easily induce a dislocation in an instance via the action of moment applying the principle of leverage. When compared with the
conventional reduction procedures in clinical practice and Roser’s procedures that retrospectively follow
the generation process of dislocation, these procedures for Seifuku therapy are basically coincident except for a loading of excessive extension on the elbow joint. Kansetsu-waza, a decisive technique form called as Kime-no-Kata aims to take a posture of dislocation by effectively loading an external force. The dislocation generation theory (injury generation mechanism) and the theory of Judo reduction therapy retrospectively following the generation process of dislocation from the aspect of kinetics were reviewed to clarify the respective characteristics. Thus, Judo-Seifuku theory was introduced through conversely tracing the individual motions of Kansetsu-waza.

In: Annals of the 5th International Judo Federation World Research Symposium Sept 12th, 2007, Rio de Janeiro, Brazil

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