To Zhang Jun Shot Put Community Sports Service System For The Elderly

This paper adopted the Arial three-dimensional analysis system imported in USA to do the work of three-dimensional filming, trimming of films,resolution of films and the calculating and comparing of the data.The subject of the paper is the elite shot put athletes of China who took part in the National Track and Field Championship of China in December,2008.The two athletes,both right-hand,rotational shot put technique and master sportsman at allare selected as the subject who are the top of ten of the nation in China. The film of the shot put competition,firstly,was digitized.Then a document of 3D-stick was composed by Arial three-dimensional analysis system.At last, the data can be exported at anytime.The paper divided the trajectory of rotational shot put at six time-space spots as follow: the biggest angle of shoulder-hip axis spot, the right foot up spots, the left foot up spots, the right foot down spots, the left foot down spot and the delivery spot. One of the joint points of athlete's body was traced, so the trajectory of the joint point can be used as technique diagnosis as well as the analysis of time-space points.The top-view and side-view of CG,ball and left knee of the athletes were compared. Zhang Jun of the knee joint angle changes in the technical phase of the features are:support phase in the legs, Zhang Jun 3 effective when the test vote in the left knee angle and knee angle is decreased, and the right knee angle is larger than the left knee angle. However, in both legs at the end of support phase, with the improvement of Shot, Chang Chun-three attempts to vote in the right knee angle sharp decline in the left knee angle was more stable and larger than the right knee angle. In the single leg support phase, Chang Chun-effective test to vote 3 times when the left knee angle and knee angle changes in trend is consistent score of 19.18m left knee when the angle range of 120°-160°between the right knee angle the range between 100°-160°. In the flight phase, Zhang Jun of the left knee angle and knee angle is decreased, and the right knee angle is larger than the left knee angle. Zhang Jun 3 vote effectively test knee angle when the sharp decline in the left knee angle was more stable and larger than the right knee angle. During the transition phase, Zhang Jun 3 times the effective angle of left knee test vote showed a decreasing trend. Zhang Jun's throwing performance increase from 17.86m to 19.18m in the throwing of the left knee angle from 81.73°, gradually increasing to 85.07°. Force in the final stage, Chang Chun-effective test to vote three times when the angle of the left knee, respectively (where score of 19.18m, score of 18.37m, score 17.86m): 117.91°,110.13°,118.69°.5 Completion of the ankle joint angle changes in the technical phase of the features are:support phase in the legs, Zhang Jun of the left ankle and right ankle angle is the angle of the rise angle greater than the left ankle and right ankle angle. In the single leg support phase, when the score was 19.18 meters, Zhang Jun of the right ankle angle from the pre-swing increased to 107.15°when the single-support phase of 141.12°, score of 18.37 meters, Zhang Chun-angle from the right ankle during pre-swing 109.79°up to the single-support phase of 134.05°, score of 17.86 meters, Zhang Chun right ankle angle from the pre-pendulum 108.25°, up to the single-support phase of 134.97°. In the final phase, Chang Chun-shot test vote in the left ankle the previous three angles are:(score of 19.18m) 120.84°, (score of 18.37m) 116.47°, (score of 17.86m) 123.28°, Chang Chun instant three shots vote left ankle angle test are:(score of 19.18m) 145.75°, (score of 18.37m) 144.19°, (score of 17.86m) 156.59°.6, the end of the double support phase, Chang Chun hip angle open shoulder early, transitional phase of the left hip angle is too large, leading to Chang Chun-body center of gravity during rotation is not smooth, then foul the main re(?)soN Conclusions of the paper are as follow: Firstly, the paper analyzed the kinematics characteristics of the two elite athletes, structured the kinematics parameters of rotational shot put and laid a foundation of kinematics research in future. econdly,the ratio of the displacement of ball and CG at pre-flight Sphase was named as the Back 7 Deflection Rate,and the Back 7 Deflection Rate of Zhang Jun is 1.5 and Zhao Zhongjun is 1.2. Thirdly, the outside swing motion of right leg is an offset motion。...