Kinematic Character Of The First And Step Jump's Take Off Technology About Chinese Elite Female Triple Jumpers

In the early 1990s, Women's triple Jump used to be our advantageous item for the first world record Of this, recognized by International the Field Event Association, was set by Li Huirong, Our Chinese sports women. However with the passage of time Chinese women's triple jump was lagged far behind the world lever spite of it stop position in Asia. Therefore, the role of giving a trial jump in first and step is utmost important, and researching the trial technology of giving a trial jump in first and step also plays a decisive role in improving the achievement of triple jump. Thus this research selects the former 8 women triple jumpers in finals of China Championship of track and field games ,which was held in Guangzhou in May, 2007, as the object of study; gives kinesiology parameters a qualitative and quantitative analysis, those parameters are taken from the process of giving a trial jump in first and step of elite women triple jumpers in our country, by using documentation research, investigation and visit, film shouting, image analytics and the statistic mathematics and physics; and probes into kinesiology features in the process of giving a trial jump in first and step. After comparison with the data of excellent athletes in the world, we try to find the law among the data and get a practical training method ,The research shows:1. The athletes in china are lower than the excellent athletes ill,the world and their weight is also not enough; Quitelet's index is lower and also has striking difference(P<0.05, P<0.05), It shows that the muscle power of the jumpers in china is much weaker than the excellent jumpers in the world.2. The horizontal velocity of the the athletes of this match is not high enough. This is the important factor which restricts the results of the the athletes. The horizontal and the vertical speed in trial step is lower and has striking difference (P<0.01, P<0.01). The rate of loss in horizontal speed has no striking difference (P<0.01) .3. More training need to do in special strength. For example. the take—off angel is too large or small; the eccentric capacity of the knee joint is too weak; the take—off angle of knee Joint is too small; etc.4. Comparing with world-class elite athletes ,our women athletes in the first and step, the angles contained by the thighs is too big when landing, whereas too small when leaving. What's more , the difference is striking. When they jump from the land, supporting legs have appropriate phenomena of bending bow and kicking and extending legs. So the capacity of speed is not trained enough. For example lack of speed of the leg which lead to the angle of two legs is too big or small.5. The capacity of controlling the proportion of hop step and Jump is not good enough. The athletes in china first and step proportion is smaller than the excellent athletes (P<0.01) . If they can use the better skills in first and step, they maybe won a better result.