Kinematic Analysis On The Front Serves Technology Of Soft Volleyball

Soft Volleyball, as one kind of volleyball, has been incorporated into the curricula of primary and secondary schools. Many universities have opened in the elective courses. It have published various materials, but in those textbooks, soft volleyball action essentials are in accordance with hard to define the essentials volleyball action and mostly in teaching volleyball in accordance with rigid teaching methods and requirements for teaching. Soft Volleyball production of materials with different impact on serving, so the research is very meaningful.In order to analyze soft volleyball serves unique technical characteristics, this study of literature, expert interviews, test, video analysis, mathematical statistics and comparative analysis. Four subjects serve a positive start, front overhead floating ball and spinning ball. Contrast of soft and hard Volleyball Serves the following conclusions:1. Under hands on him serve of soft volleyball, the trunk angle is significantly greater than the rate of hard volleyball. It is through the use of the torso for increase the power of Arm shots.2. On the front of the feeble and the floating ball spin, the drop height is lower than the hard volleyball, both with very significant difference. Topspin in the hair, the soft volleyball of the trunk inclination than a hard big 3.62 degree, significant differences between the two; floating in the hair, the soft volleyball rotation angle than the hard shoulders big 4.14 degree, both with very significant difference.3. Arm swing before hitting the faster hands, the speed of ball is very faster. But It is careful when hitting the ball must be hit potential to reduce energy loss. Serve the ball to the same point, soft volleyball required more energy. It is mainly due to soft volleyball flying in the air is greater than the resistance by the hard volleyball.4. Instant hit in the arm swing, soft and hard Volleyball in a high launch angle, there was no significant difference. But the angle of the shot there was significant difference in the angle shot.Soft Volleyball had be significantly smaller than hard. It was mainly due to soft volleyball flying in the air resistance by the larger, in order to increase the forward force, achieved by changing the angle shot. Volleyball song become weak when the amplitude was significantly smaller than the rigid wrist volleyball, it is due to wrist curls too much and too fast can easily down the nets.5. Soft Volleyball has a brief acceleration after the ball shot, it is probably due to elastic potential energy into kinetic energy caused.6. Soft volleyball is very soft and the weight is not easy to grasp. So it is difficult to served spin and float ball.