抄録
The purpose of this study was to get some knowledge for effective coaching of movement of powerful spike
in volleyball. Especially important factor about spike skill (1,2,3)was analyzed by an observational evaluation
method for powerful and sharp spiking in movement of the swing phase.
1) Torso twisting on back swing.
2) Keep the hitting arms elbow at the same level with a line joining both shoulders.
3) Hitting the ball as keep the balance and returning from torso twisting.
1. As for the torso twisting
a. More movement of the torso twisting is necessary for powerful and sharp spiking.
2. As for hitting arms elbow position on back swing.
a. It is not effective directly that the hitting arms elbow is kept at the same level with a line .joining both
shoulders.
3. As for movement and balance of the torso using well on forward swing.
a. Torso movement and balance using well are necessary movement for powerful and sharp spiking on forward
swing.
b. Keeping good balance at the hitting phase is the basic movement for powerful and sharp spiking.
c. These need for torso movement to focus on hitting position and to get the timing
