Oi zuki

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An oi zuki or oi tsuki is a lunge punch technique found in karate which can strike in either jodan, chudan or gedan.

[edit] Execution

[edit] Shotokan

In Shotokan karate, oi zuki is typically executed from Zenkutsu dachi (front stance). It begins with the forward arm being raised, executing an intermediate knife hand block while also focusing on the target point of impact. Next, shift your weight slightly forward as the back leg is shifted towards the centre of gravity and continued forward in a stepping motion. As the back leg passes the front leg, the back hand begins to move forward, the forward hand begins to move backward, both with elbows kept tight and close to the body. The power begins with the back foot stepping forward and is continued with the hip rotation during the step and completes with the final snap-punch of the (now) front hand. All muscles must remain totally relaxed throughout until the very instant of impact. This timing-technique is known as kime.

[edit] Kyokushin

In Kyokushin karate, the body movement is still much the same as in shotokan; however, the punch starts as a clenched fist in hikite, with the inside of the fist turned up, and is then thrust forward, keeping the elbows close to the body. Right before the end of the technique, the fist is twisted around, so that the inside of the fist points to the ground.

A short burst of exhaled air should be done at the moment of impact, along with an instantaneous, strong tightening of arm, stomach, buttock and back leg muscles.