1998 Volume 11 Issue 1 Pages 141-147
The purpose of this study was to investigate the blocking skill against combination offense in volleyball. The spikers and blockers who played in the game Italy versus Japan in the 1995 World Cup were filmed at 100 f. p. s. with two 16 mm cinecameras and a VTR. The cinematographic data from the blocking motions were computed by the Direct Linear Transformation Method.
The results were summarized as follows:
1) When two or three blockers could jump to block against attackers, the percentage of successful spiking points was lower than with one or no person blocking.
2) The point of the fingers of subject H. O reached by blocking was as high as the point of fingers of subject G. A, except for the block against a playset attack.
3) As the fingers of the center blocker projected over the net just before the quick spiker attacked, according to the sequential data of the blocking, it is difficult for the quick spiker to attack placing the ball crosscourt or down the line after the spiker sees the blocker's hands.
4) When the center blocker must use the reading block against the quick spike, it is important to jump to block stretching up both arms.
