Kinematic Analysis Of Hebei Province, Men's Volleyball Athletes Jump Serve Technology

After implements each ball score system, follows the change of the loses points the structure,"spelling serves"becomes newly serve the idea, broke the past to serve and to meet to a certain extent serve the relative balanceable phases.The modern volleyball serves has the high spot, the muscularity characteristic, has makes first move and gets co- ntrol, the function which overcomes the enemy.The aggressivity strong serves is equal to the attack start, can score points directly or break through opposite side defense, strives for the first round initiativty, creates advantageous condition for the score of counter-attacks. In order to enhance the aggressivity which serves,the world strong volleyball teams uses generally jumpsing vigorously serves.Jumping vigorously se- rves has the characteristics of driving spot high, the strength great , the flighting time short, the speed quick and so on,and breach the limit of the opponent response and the reply movement, achieve scores points directly and destroys the goal which as soon as breach opposite one passes eparty .Jumping serves is the method of take attack and the suppress opponent attack, is the vital role to the competition victory and defeat from the technique and tactics and in the psychology,the minacity to the opposite side to be bigger than other serves ways, but because the jumping serves technical is very difficulty, not easy to grasp, creates its fault rate to be accompanied by its minacity to be equally far is bigger than other serves ways. Jumping serves compose by throws ball, the run up and approachs takes off airborne, drives on the air and falls to ground, in which the two taches of takes off airborne and drive is to play the vital role to the entire technical movement.Therefore, this article th- rough the utilization three dimensional video recording analysis tec- hnology, research to jumping serves and takes off the the two parts , discovered: Before 1) 8 members in take off to pursue excessively flush the distance in the process, reduced the greatest height after galloped , created the leap angle to be generally small;But as a result of the in- dividual difference and affects the factor to be multitudinous, the ath- lete has the best angle of to leap respectively, does not need to unify emphasizes one angle; 2) when wields the arm to drive , the waist abdomen contracty strength is small; The ball and human's position relations is unreasonable, the drive spot is low, extension scope of the right elbow joint is small, to hindrance speed and the momentum transmission, reduced speed of the wielded arm; the angle of afther drive is to be great, the flight trajectory long, the time was long, reduces the speed of the ball to screw up; 3) disparity is very big, which when the right hand drive the transient acceleration on the 8 members and the top athlete,the ave- rage cost is only 49.56 m/s2, too is far with Moya's 77.99 m/s2, creates the using rate of the speed with fingers and the palm joint is to be small, drive effect is not to be ideal, after drive the ball speeed is to small; 4)The greatest boll speed after the 8 members drive, the highest is 27.85m/s ,the lowest is 21.6m/s, compares with top athlete's 35.24m/s has the hugeness difference.