The Three-dimensional Kinematic Analysis on Some of Our Country Outstanding Female Triple-Jump Athletes’ Technique of Three Jumps
|Course||Physical Education and Training|
|Keywords||woman the triple-jump shan full jump turned jump leap technique kinematics|
Analyzing and diagnosing the technique of the triple-jump has the important significance for improving the overall level of the triple-jump of our country. This article carries on the scientific research on the female triple-jump by designating first six athletes of participating in the female triple-jump contest of 2004 " Fei Pu Lai Cup " National Track and Field Grand Prize Series Match(NanJing Station)as research objects,using two JVC9800 high speed cameras to synchronizationally photograph by the speed of 100f/s,using Germany SIMI-motion video recording analysis system to analyze pictures.The results as follows:(1)Irrationally keeping the horizontal velocity,the loss rate of horizontal velocity is so high that the loss of horizontal velocity is excessive.(2)The average angle of touchdown of take-off leg is universally higher than the general outstanding women athletes’. The average angle of take-off of take-off leg of former 2 jumps is lower than the general outstanding women athletes’and the average angle of take-off of take-off leg of the third jump is higher than the general outstanding women athletes’. Research objects’the average angle of billowing of gravity of body is all still high in 3 jumps. (3)Research objects’the average range of buffer of hip and knee and ankle is smaller than the world outstanding women athletes’in the stage of the take-off leg buffering in 3 jumps. Research objects’the average range of stretch of knee is smaller than foreign outstanding women athletes’. (4)The remaining research objects’the angle of two legs is not enough big in the instant of the take-off leg touchdown except for HuangQiuYan and the angle of between swing leg and water is not enough big in the instant of the take-off stretchup.Athletes best use the single-arm swing in first and second jumps and YuShaoHua and LiXiaoLing’the way of swing arms is not reasonable. Athletes should use the double-arms swing in third jump.(5)Compared with foreign outstanding women athletes,research objects’ratio of 3 jumps,the ratio of first jump being still big,the ratio of second jump being still small,the ratio of third jump being still small yet,is incompatible with normal ratio of 3 jumps. (6)Six athletes’take-off time not being enough short in 3 jumps is not conductive to the maintaining of the level speed.