抄録
The purpose of this study was to analyze the characteristics of the setting technique in combination attacks focusing on the trajectory of the ball was set and the arm of the setting motion. The setting motion of the setters that were playing in world − class competition was analyzed. The general tendency was extracted from the analyzed data, and was explained biomechanically.
The trajectories of the balls was set were close. And the characteristics of the setting technique in combination attacks are on the following two points.
1）The arm angle is approximately 137 degree from touching to release the ball.
2）The timing formed the setting posture is approximately 0.233 second before touching the ball（approximately the take − off）.
It is considered that their two motions are useful not to give blockers the clue of the set direction before releasing the ball. After releasing the ball，the close trajectory of the ball suggests that it is difficult for blockers to judge the position attacked.
