Even wat uitleg over Keylock, Americana en Kimura
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(en sorry alleen in 't engels nu, ben te lui om iets in 't nederlands te zoeken)
quote:
A keylock (also known as a bent armlock, figure-four armlock or ude-garami) involves holding the forearm and using it to twist the upper arm laterally or medially, similarly to turning a key in a keyhole. It is usually considered to be a shoulder lock since the primary pressure is often on the shoulder. But depending on how it is performed, significant pressure can also be applied to the elbow and it is considered to be a lock on the elbow in judo circuits. It can be applied from a multitude of positions, and it is the most common shoulder lock used as a submission hold in mixed martial arts competition. The keylock has several variations with their own names, for instance depending on in which direction the arm is rotated. The word "reverse" is sometimes added to signify medial rotation as in reverse keylock or reverse ude-garami, in which case the usage of just "keylock" indicates lateral rotation.
The americana is a term used in Brazilian Jiu-Jitsu to specify a lateral keylock. This lock is generally applied only from the mount or side mount, since it needs support from the ground to be effective. The opponent's arm is pinned to the ground so that it is bent at the elbow, with the opponent's palm upwards. The wrist is grabbed with the opposite hand, and the arm on the same side is put under the opponents arm, gripping the attackers wrist. This results in the necessary figure-four hold. By cranking the elbow upwards while keeping the opponent's hand pinned to the ground, significant pressure can be put on the shoulder.
The kimura (in various forms of wrestling also known as a chicken wing) is a term used in Brazilian Jiu-Jitsu to specify a medial keylock. The application is similar to the americana, except that it is reversed. It needs some space behind the opponent to be effective, and can be applied from the side mount or guard. Contrary to the americana, the opponent's wrist is grabbed with the hand on the same side, and the opposite arm is put on the back side the opponent's arm, and again grabbing the attacker's wrist and forming a figure-four. By controlling the opponent's body and cranking the arm away from the attacker, pressure is put on the shoulder joint, and depending on the angle, also the elbow joint (in some variations the opponent's arm is brought behind his back, resulting in a finishing position resembling that of the "hammerlock" outlined below). The kimura was named after the judoka Masahiko Kimura, who used it to defeat one of the founders of Brazilian Jiu-Jitsu, Hélio Gracie.
Bron: wikipedia