关键词: 女子, 背越式跳高, 运动学分析, 助跑, 起跳

Abstract: The paper investigated the kinematic characteristics of elite female Fosbury Flop jumpers and compared the kinematic difference between high-level jumpers (n=6) and level-1 jumpers (n=8) in their run-up and take-off stage to provide quantitative basis for athletes’ scientific training. The researchers recorded the Fosbury Flop process of both high-level jumpers and level-1 jumpers with 3D video camera, and analyzed the two groups’ kinematics data collected with Simi Motion 9.01 using an independent sample t-test, and made a person correlation analysis together with their scores. Results: (1) In the run-up stage, the gravity resultant velocity of the high-level jumpers in countdown step 3, step 2 and step 1 was significantly greater than the level-1jumpers(P＜0.05), and high-level jumpers’ caster angle in countdown 1 is significantly smaller than the level-1 jumpers(P＜0.05); (2) In the take-off stage, the high-level jumpers had bigger angle of toe-in, stretching range of the hip on the take-off leg, range of gravity shift than the level-1 jumpers (P＜0.01), Both the vertical gravity velocity of the take-off leg at the landing moment and the height of the gravity off the ground at the take-off moment were significantly higher than that of level-1 jumpers(P＜0.05); (3) In countdown step 1-3, the gravity resultant velocity and the jumping, pushing and stretching angles of both hip and ankle, their angles of toe-in, and the height of gravity presented a remarkable correlation. In countdown step 1, the caster angle and the angular velocity of the swinging leg, and angle of toe-in of the take-off leg at the landing moment were in significant negative correlation.

Key words: Female, the Fosbury Flop, Kinematic Analysis, Run-Up, Take-Off