isshinryuronin
Senior Master
This is actually a very good question. My answer is surprisingly "not much." It's easy to avoid being hit - the problem is that many of these ways also make it hard for you to attack. The challenge is to be in position while keeping the opponent out of position. One must attack in a way that avoids a stop hit, evasion or counter. A well-timed entry and proper angle go a long way to achieve this.In striking art, how much effort will you devote for not being kicked/punched?
Another method is one old traditional Okinawan karate is largely based on - The attack itself contains defensive elements that preclude the opponent's escape or counter. So, in answer to your question: As defense is built into the attack, little extra effort is needed to keep from being kicked/punched. Offense and defense are done simultaneously, sometimes within a single move.