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. In
budo these are referred to as, 関節技 kansetsu-waza, "joint locking technique") and in
Chinese martial arts as
Chin na su which literally means "technique of catching and locking". These typically involve isolating a particular joint, and
leveraging it in an attempt to force the joint to move past its normal range of motion. Joint locks usually involve varying degrees of pain in the joints, and if applied forcefully and/or suddenly, may cause
injury, such as
muscle,
tendon and
ligament damage, even
dislocation, or
bone fractures.
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