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A joint lock is a grappling technique involving manipulation of an opponent's joints in such a way that the joints reach their maximal degree of motion and hyperextension.. In judō these are referred to as kansetsu-waza (関節技, "joint locking technique" [1]) and in Chinese martial arts as qin na, which literally means "catching and locking".
Joint locks can be applied on anything that bends, such as fingers, wrists, elbows, shoulders or knees. Application of locks might include gaining purchase for throwing techniques, encouraging cooperation, submission, or restraining an aggressor. (Such techniques are taught to police forces.)
Depending on the joint flexibility of a person, armcoils can either hyperrotate only the shoulder joint, only the elbow joint, or both the elbow joint and shoulder joint. [1] Obtaining an armlock requires effective use of full-body leverage in order to initiate and secure a lock on the targeted arm, while preventing the opponent from escaping ...
The hand becomes maximally pronated, resulting in a joint lock on the wrist and radioulnar joint. The degree of possible pronation depends on the degree of flexion at the elbow, as a bent elbow inhibits rotation of the humerus. Hence, straightening the arm allows rotation of the whole arm and alleviates the pressure on the joints. The arm has ...
An Achilles lock (also called an Achilles hold or Achilles squeeze or Ashi-Hishigi in judo) is a compression lock that involves pressing the Achilles tendon into the back of the ankle or lower leg. It is typically performed by wedging a forearm , especially a bony part of it, into the Achilles tendon, while leveraging the foot and the leg over ...
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