| （School of Physical Education and Sports，Beijing Normal University，Beijing 100875，China) Abstract: By using the QUALYSIS and KISLER systems, the authors carried out a sports biomechanical analysis on the single body bent and leg split jumping and successive two times body bent and leg split jumping moves made by 26 class one aerobic gymnasts, and revealed the following findings: the male gymnasts could complete successive body bent and leg split jumping well, however, the second jumping in successive jumping was significantly different from single body bent and leg split jumping in terms of such indexes as flying time, flying height, hip joint angle during flying and vertical takeoff momentum, not as good as what were performed in single body bent and leg split jumping; the female gymnasts had a relatively poor performance in completing successive body bent and leg split jumping, except the takeoff buffer time, which showed no significant difference, all the other indexes showed a significant difference between the second jumping in successive jumping and single body bent and leg split jumping. Therefore, the authors suggested that female gymnasts avoid the combination of two group C difficulty moves whenever possible. In addition, the male and female gymnasts showed very significant differences in the 3 jumps in terms of flying time, flying height, hip joint angle, vertical takeoff momentum, the jumping effect of the male gymnasts was significantly better than the female gymnasts’, yet there were no significant differences in terms of buffer time, stretching time, takeoff time, and knee joint angle during flying.
Key words: sports biomechanics；competitive aerobics；single jumping；successive jumping |
