Analysis On The Approach Run And Take-off Techniques Of Junior Class 2 Long Jumpers

This thesis summaries some technique regulations and characteristics of juvenile long jumpers in run-up and take-off through photography and analysis .For example , level of run-up speed ,affection of run-up speed to take-off ,body parameter during take-off and so on .Further more , portray kinematic characteristics ,compared these kinematic characteristics with high level long jumpers and each other ,find shortcomings .Come to conclusions as follows :Run up speed disparities between juvenile and high level female long jumpers ,so we need absolute and run–up speed training.The take-off leg knee joint , hip joint angle when they get to the board and the most keen angle in the take-off process are all smaller than those of high level female long jumpers . The gravity speed is slower than high level long jumpers , keen and hip angles of take-off leg are smaller than high level long jumpers when take-off.The gravity vertical speed and gravity flight angle of juvenile female long jumpers at the moment they take off the board are both within the standard scope, approximated to high level long jumpers, which are their advantages and traits.The author carries on scientific diagnosis and conclusion according to technique traits coupled with their growth characteristics ,and come up with advice :take-off and specific capacity as training main parts .These advice offer to coach and athlete to consult and use ,in order to make contribution to .