Receiving a service is a critical skill in volleyball, which is not only a defensive but could also be a start of an attack sequence. The ball-location anticipatory skill of volleyball players receiving a service was investigated by using the temporal occlusion method. Participants were experienced male university volleyball players（ n = 7) and male university students inexperienced in volleyball（ n = 8). They were required to anticipate the landing location of a ball by observing the server’s motions presented in edited videos. Five temporal occlusion conditions were adopted: t1（ at finishing back swing motions of the servers), t2（ at finishing the elevation of servers’ elbows during forward swing motions), t3（ when the ball makes contact with a hand), t4（ at finishing follow-through motions of servers), and t5（ no occlusion). Measurements of anticipatory skills consisted of the mean radial error, the mean lateral error, and the mean depth error. Results of analyzing the mean radial error indicated that experienced players could anticipate the landing location of the ball more accurately than inexperienced players under all the occlusion conditions. Analysis of the mean lateral error indicated that experienced players could extract meaningful information about the lateral direction prior to making ball-to-hand contact（ t3) and that the error rate of experienced players was less than that of inexperienced players in the t1 condition, indicating that experienced players could gain significant information before the servers finished the back swing motions of their services. The analysis of the mean depth error indicated that experienced players could anticipate the depth direction more accurately than inexperienced players in later occlusion conditions（ t3 and t5). These results are however limited by the ecological validity of the study because the servers’ motions were presented to the participants by using two-dimensional videos.

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This study investigated the characteristic of legs during takeoff in the spike jump.70 volleyball players were done questionnaire investigation of before an experiment. The questionnaire investigation showed that players of 75.71% were taught by a coach to take off a tiptoe for, and players of 61.54% were experienced the injury of lower extremity. Six university women volleyball players spiked and they were analyzed movement of spiking using the 3D direct liner transformation（DLT）method. We divided the players into two groups : Type SH（n=3），players who spike jumped introvert foot angle -40deg or more; and Type FL（n=3），players who spike jumped at -40deg or less. Horizontal velocity of the approaching phase was 1.83 ± 0.08 m / s for type SH and 1.45 ± 0.15 m / s for type FL. The vertical velocity at take-off was 3.26± 0.16 m / s for type SH and 2.81 ± 0.09 m / s for type FL. The jump height of type SH was 0.57 ± 0.04 m, and the type FL was 0.54 ± 0.02m. Efficiency of conversion from horizontal velocity to vertical velocity at the foot sole grounding（ ECHV） of type FL was 194.92±20.62％, and ECHV of type SH was 178.43 ±13.40％ . A ratio of the vertical velocity when the hip joint of the leg which player took off bent it most for the vertical velocity when stepping forward leg just before the jump（ RCR） of type FL was 52.11±2.93%, and ECHV of type SH was 36.63±3.66%. Those results thought that the analysis that we focused on an introvert foot angle difference could offer precious information to players and the coaches. In addition, it became clear that type FL was superior in skill to convert approach velocity into plumb velocity effectively.

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In 2016, Kindai University volleyball team was the 5th place in the Lower League in the Spring League, hosted by Kansai University Volleyball Federation. However, in the Autumn League of the same year, the team placed second in the preliminary league (four wins and one loss), and then won the championship (four wins and one loss) in the final round league. The aim of this study is to clarify the relationship between the ranking and the performance of the team in both of these leagues, and to examine the team performance in context with their strategic plan. Using the JVIMS part B data, this study analyzes three categories of play, that is, The success rate of the Serve Receives, Attack, and the Average number of Blocks per one set by game matches against different collegiate teams to investigate the play style of Kindai University volleyball team. As a result, we found that the Average number of Blocks influences victory or defeat most in 3 plays.

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The purpose of this investigation was to elucidate the kinematic characteristics differences of volleyball spikes between different positions in women players. Twelve women collegiate volleyball players (six side-spikers and six middle-blockers） were participated in this study as volunteered. All participants were equipped with 24 passive reflected makers on their body and spiked the ball. Two synchronized highspeed digital cameras (299.7 Hz） set out of the volleyball court were used to collect the 3D marker trajectories. Jumping height, swing speeds of upper limbs during the flight phase and the ball speed were determined by motion analysis software (Frame-DIAS V, DKH, Japan）. The results demonstrated that the jumping height (p ＜0.05） and the ball speed (p ＜ 0.05） were significantly higher values in the side-spikers compared to those of the middle-blockers respectively, whereas there were no significant differences in the hand displacement between the positions. The swing speeds of the hand and the wrist revealed the significant differences, which was greater in the side-spikers than in the middle-blockers. In addition, the absolute values of the shoulder velocity and the trunk horizontal abduction angular velocity were also greater in the side-spikers. These observations suggest that the greater jumping height and the proximal swing motions might be important to increase the distal swing velocity and increase the ball speed.

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The purpose of the this study was to intellectual elaboration of approaches to inner knowledge and truth, with the universality widely in coaching science through the construction of a Comprehensive Coaching Mental Model by the one-to-one semi-structured, in-depth, open-ended interviewed to proven five high school men's volleyball coaches. Analysis was performed by M-GTA（ Modified Grounded Theory Approach）.As a result, generated 115 pieces of ‘Concept’from 96,521 characters of Talking, and generated 11 pieces of ‘Category’from many ‘Concept’. Moreover , generated 5 pieces of ‘Category Group’ from　many ‘Category’.The generated ‘Category Group’ was respectively ‘Roots of Coach’, ‘Coaching Philosophy’, ‘Concrete Coaching Behavior’, ‘Cultivation of Strength’ and ‘Expected upbringing personality’ Finally, Comprehensive Coaching Mental Model of high school men's volleyball coach was generated.

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The purpose of the present study was to clarify the relationships between body height and various performances in volleyball players. Eleven professional volleyball players were participated in this study. We classified participants into high group (HG） and low group (LG） based on their body height according to criteria of 197.8cm. We measured body height, standing reach height and body mass as body composition. Also, jump height and reach height of spike jump (SPJ） and brock jump (BJ） were measured as well as various jump height as jump performance. Furthermore, pro-agility test and medicine ball (MB, 3kg） throw were performed. The results as follows: 1） In SPJ and BJ, reach height was significantly higher in HG than LG. On the other hand, jump height of SPJ and BJ were significantly lower in HG than LG. Also, HG was higher than LG in CMJ height. 2） In pro-agility Test and MB, there was no significant difference between groups. We concluded that body height would be a disadvantage for jump height, although body height is crucial factor for reach height of various jump.

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This paper attempts to clarify how the U.S. women's volleyball team trains the next top players. It is beneficial to study U.S. top junior volleyball clubs when we consider how junior ／ youth players in Japan are trained and supported. conducted on-site interviews on the coaches of the several top junior teams in the United States. As a result, their training environments and methods were revealed based on coaching policies, methods, motivations and expectations for the players. Clubs have their own court and carry out phased special program with specific goals and policies divided into ages. Clubs try to bring up and train players by dividing them with a merit-based system. Coaches can select working conditions and have two jobs if they get the licenses. So we can expect that the number of coaches will increase, and they will be motivated more to train players. Also their skills for training will be improved. It is likely that improving the system for club influences training junior volleyball players in U.S. positively.

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