Ways to Defend the Centerline
Blocking techniques may be applied in multiple ways depending on circumstances. For example, at the basic level the blocking arm can be used to simply parry a punch or kick using a "strength against strength" principle. This will be successful as long as the block is stronger than the opponent's strike.
At another level, the effectiveness of the blocking can be enhanced by simply shifting off the line of attack and adjusting the angle of your body obliquely (approx 45 degrees) to the incoming strike. In this way, the lead arm slips the strike, and the ”soft contains the hard."
At yet another level, blocking can be performed as a two level system based on "intercepting and redirecting" the incoming attack in conjunction with the body shift mentioned in the previous paragraph. Here, the trailing arm is used to "intercept" or cover the incoming attack after which the leading arm is used to "redirect" the force of the attack away. Alternatively, the trialing hand may be used to intercept and the leading arm used to counter strike the opponent.