| （1.School of Physical Education，Soochow University，Suzhou 215021，China；2.School of Physical Education，Nanjing Normal University，Nanjing 210097，China） Abstract: The authors analyzed the last three-step running up technique of ZHENG Xing-juan as an excellent fe-male high jumper in China, and revealed the following findings: the curve of last three-step running up by ZHENG Xing-juan was not connected fluidly, which resulted in the loss of horizontal running up speed; during running up, the swinging move of her arms was not normative, and at the last two steps, the “secure supporting” move of her swinging leg was not well made, which directly caused the increase of the inner tilting angle of her body; at the last steps, the center of gravity of her body rose at the moment her running up foot landed on the ground, which thus af-fected the connection of running up and taking off; at the last step of running up, the horizontal speed of the center of gravity of her body decreased significantly, was only 5.94m/s at the moment her taking off foot landed on the ground, 0.64m/s lower than that at the last two steps, lower than that of excellent female high jumpers at home and abroad; at the moment her taking off foot landed on the ground at the last step of running up, the vertical speed of the center of gravity of her body was a positive value , and the center of gravity of her body showed a trend of going up. The last three-step running up technique of ZHENG Xing-juan needs to be improved.
Key words: sports training；last three-step running up technique；high jump；ZHENG Xing-juan |
