The relationship between run-up and take-off in broad jump is analysed through thesimple principles of mechanies.

Throngh detailed and systematic study of teaching approach and means of strengthening accracy exercises of long jump run-up and take-off, we find that they contribute remarkably to improving students achieve- ments.

Through using the method of observation,literature and mathematical statistics,this paper makes investigation on take-off violation of male and female jumper who participating in the triple-jump match of the 2007 national track and field specially permission match(Chongqing station).

The Sport Analysis of Foot Contact and Takeoff on Man and Woman Vault Handspring Followed Salto Forward with One and Half Turn;

Through the calculations on finite elements in the takeoff of back flop high jump,the stress- strain changes of Achilles tendon were obtained.

By high - speed film camera and three - dimension synchronic measurement, the author probes into the change of the athlests takeoff components and the effect of the different langing techniques on the force pressed the athlete s body in the practice of takeoff leg s depth long jump various platforms from the various high platforms to the takeoff points.

After studying various reasons for the fouls occurred at the take-off in long jump, the author believes that a good consciousness control ability plays a key role in the accuracy of board take-off, which will be a certain theoretical basis for the improvement of the take-off success rate.