The purpose of this study was to investigate the torso twisting during the spiking motion of Japanese elite male volleyball players. Spiking motion of volleyball players was videotaped by two high-speed VTR cameras operating at 250 Hz to obtain three-dimensional coordinates data of the body segments and the center of the ball. The velocity of the ball, hand and shoulder and twisting angle of the torso were calculated. The results were summarized as follows; (1) The large twisting angle and the large angular velocity of the torso twisting contributed to increase the hand velocity at the impact. (2) Maintaining the shoulder velocity in the direction of the swing at the impact help to achieve large ball velocity. (3) To obtain large shoulder velocity in the direction of swing at the impact, they used two types of torso motion: the first type predominated forward flexion of the torso, the second one predominated forward twisting of the torso. Although most of the players combined the both of torso motions during spiking motion, the twisting type is preferable to obtain large shoulder velocity and then ball velocity as a result.

View full abstract

In leading study, it has been made cleared that JVA must develop the management in conformity with an idea of“For all”. Then in this study, we focused on France in which in recent years, the international sports performance is better and better, and sports administration fills up. And the following is the process in this study. Firstly, made clear“The obtained good results”to be able to been proved as the numerical value. Next, made clear The actual condition in“The organization and enterprise”of background of“The obtained good results”. And further, we worked out the idea and consciousness structure on which such a organization system based on. Then, by these results we analyzed and considered the characteristics in FFVB organizational structure, from both viewpoints of“coaching”namely performance progress and spread progress and of“administration” namely“the organization in organization”structure. Finally, we suggested the direction to assignments solution in JVA management. By this, we could do this study as introduction to next step study, as to say, to extract concrete idea for assignments solution by making clear“Volleyball Identity in Japan”from a comparative study with the exterior.

View full abstract

The purpose of this research explains the characteristics of the attack in the Japanese team and the opponent team by evaluating player's attack performance in the one by the attack situation, the one by the attack construction type, and it is to investigate the strengthening point of the future Japanese team. The samples were 3matches, 11sets in the 2000 Olympic Final Qualifications for women's volleyball. The following knowledge could get as result. 1) Though the appearance frequency of T3-3 in SRA showed a tendency of being high, Attack Performance of the Japanese team was low, and lack of scoring ability of Attacker was remarkable. 2) The appearance rate of the quick attack of the center player in SRA of the Japanese team is low, and guesses that an attack pattern becomes monotonous to be the cause of lowness of Attack Performance. 3) Lack of scoring ability of Side attacker with T1-3 in ARA and T1-2 is remarkable, and you must raise the decision power of Deep Set in the Japanese team. 4) The establishment of the combination which can show high attack performance with improving each player's attack performance in the whole of the team, and the attack system is necessary for the Japanese team.

View full abstract