This study aimed to obtain useful suggestions for coaching, by clarifying the characteristics of changing the direction of A quick, by motion analysis. On applying motion analysis to a total of 6 middle blockers in university, or men`s V・ Challenge League specializing in quick attack, it was found that there was a difference in changing direction of A quick. This study obtained useful suggestions for coaching due to the above. To change the direction of A quick, there are three important methods: 1. changing direction by movement of the trunk rather than the shoulder joint, and shifting the impact point by half on the ball indirection in which the player wants to hit. 2. In case the player wants to hit the ball to cross, twisting the player’s body largely backward from takeoff to taking back and shifting the impact point to the right side, rather than hitting by turning, and stooping the trunk to transmit force to the ball for impact. 3. In case the player wants to hit the ball by turning, he does not twist his body backward from takeoff to taking back and shifting the impact point to the left side, rather than hitting to cross, without stooping the trunk in order to obtain space for swinging, and bending the trunk to the left, in order to transmit force to the ball
