The Kinematic Features Analysis Of Soft Volleyball Positive Spike At Take-off Moment-hitting Over The Net

Soft Volleyball from indoor volleyball as a recreational sport derived, is constantly receive attention and promotion of universal access, with their children in middle-aged and generally carried out in the crowd, soft volleyball has entered the major colleges such different levels, different types of school classrooms, and conduct other types of soft volleyball game ball as a physical soft volleyball and indoor volleyball different characteristics, teaching the game in action there is a certain number of technical differences, but In Search of the relevant literature and soft, hard material found in volleyball, volleyball for the rigid motion analysis technology more action for the Soft Volleyball mainly on aspects of narrative text, data, fewer researchers, while the soft volleyball and hard volleyball trials comparing the reference of the study was the link from the teaching effect of the comparison, data from two different spheres of action when the difference between the spike comparative analysis of the literature has not seen. Volleyball Spike is most effective when the attack means to hit the ball off and air is the spike in two key areas, compared to hard volleyball as a reference group of soft volleyball moment Pike off-hit the ball over the net Technique kinematics analysis, Soft and Hard Spike Action Volleyball further discriminant analysis, on the Soft Spike Volleyball with Hard-depth study of the action, for the mastered Soft Volleyball has very important significance. In this paper, the use of experimental method, using high speed video camera (120Hz) measurements, obtained on the Xi'an Institute of Physical Education grade volleyball title II Volleyball Player 5 male athletes live camera, camera distance to the spike off at the point of 12.6m. Male subnet with 2.43m high standard, each player from the net at 30cm,75cm two locations in order to complete three soft, hard spike volleyball, capture the soft, hard spike volleyball all 15 images. APAS video analysis software used analytical processing, instant access to take-off from the ground to lead the largest arm, the lead time to hit the maximum moment arm, hitting the ball over the net moment to the moment of the three segments in the hip angle, elbow angle, wrist angle body center of gravity, ball-related changes in the kinematic results.Through analysis of the results of research, the following conclusions: 1. In recent network and web sites were far from the soft, hard volleyball spike movements, because the different nature of the sphere, the rate of take-off run-time than soft Volleyball Volleyball slower than the hard, to be late. 2. Soft and Hard Volleyball Volleyball Spike to the moment of take-off ground ball over the net on the technical aspect, to lead from the moment arm to the maximum take-off, the hip angle and the angular displacement of the hip was no significant difference (P> 0.05), probably because of the physical characteristics of their different spheres, in the run-off, the athletes run-up time, distance adjustment for accurate shots. When the lead arm in the largest to hit the ball instantly, hitting various aspects of technical data when there were significant differences (P<0.05), may be the soft quality of light in the hard volleyball volleyball, ball deformation, ball time and Arm After hitting the inertia effect, making the soft, hard hitting volleyball action when there are some technical differences. To hit the ball over the net instantaneous phase angle wrist shots, the role of time and the flight speed after hitting the ball there were significant differences (P<0.05), which may be due to the volatility of soft volleyball, the buffer part of the force, resulting in momentum acting on the ball caused by relatively reduced.3. According to the spike when the Soft and Hard Volleyball Volleyball action when the difference between the technology exists, making soft volleyball teaching should enable students to pay attention to run-time, distance, push the wrist shots and whipped the use and duration of action with the ball hand to be complete and accurate swing.