The Biomechanical Analysis on Technique of Swing Leg in the Taking-off Skill of Long Jump

According to the principle of biomechanics, base on sport characteristic of taking-off leg. The article hold action of swing leg in the taking-off skill divides three of moment with front swing behind body, front swing forward body and sudden stop trig, and analysis technology characteristic of swing leg in the taking-off skill effect sport achievement. Educe to recognition long jump athlete at power speed and extent of item training, and advance importance factor of athlete achievement.