Through telemetry EMG test and three-dimensional force platform, we tested four outstanding men's long jump athletes using the method of image analysis, mathematical statistics methods. in plate buffer stage, the rectus femoris and the right side of the object of study gastrocnemius EMG integral average of 102.00 uvs 91.25 uvs, the vertical direction of the object of study by the force mean 7035.16N an athlete Lee * vertical direction by force 6428.30N, its value is significantly less than the vertical force mean; kicking stage, research object the rectus abdominis integral value reaches 131.00 UVS, the vertical direction of the object of study by the maximum force when the vertical direction of the force mean 3226.32 N, Li * perpendicular to the direction of the force 3652.65N, subjects take-off leg landing impact force on the ground an athlete to be significantly less than the two athletes. Kicking stage, the torso rectus abdominis and the take-off leg of the rectus femoris performance is the most excited, appeared mainly in muscle; maximum force when the vertical direction of the object of study, the greater the higher the level perpendicular to the direction of maximum force by contrast to horizontal direction.
