The purpose of this study was to analyze kinematic variable at the time of Judo obstacle forward rolling breakfall. To do so, three dimensional kinematic variable at the time of Judo forward rolling breakfall motions was calculated on five model males of Y university, and, time?C. O. G. variable wer...
The purpose of this study was to analyze kinematic variable at the time of Judo obstacle forward rolling breakfall. To do so, three dimensional kinematic variable at the time of Judo forward rolling breakfall motions was calculated on five model males of Y university, and, time?C. O. G. variable were established. That was standardized using cubic spline interpolation based on the maximum motions time by calculating average value and standard deviation per each factor. As a result of this analysis, I reached following conclusion. 1. Time variable At the time of Judo forward rolling breakfall motions, the total required time was 0.93 seconds, and to describe per phase; at the second phase, air phase, 0.50 seconds(54%); at the third phase, completion phase, 0.36 seconds(38%); and the first phase, take-off phase, 0.08(8%) seconds. 2. Posture variables The angle of right·left knee joint·hip joint were extended at take-off phase, right·left knee joint were flexed, right·left hip joint did't exchange at air phase. The angle of right knee joint·right·left hip joint·were flexed, the angle of left knee joint was extended at safety breakfall phase. 3. C. O. G. variable Left(0.01m)·front(0.26m)·up(0.13m) moved at take-off phase, and left(0.09m)·front(1.46m)·up(0.32m) moved at air phase, and left(0.15m)·front(3.79m)·dawn(0.71m) moved at breakfall phase. In conclusion, all the subjects conducted bending and stretching exercise and made the center move for jumping higher at take-off phase, assumed motions to keep balance at air phase, and assumed motions for widening base surface by lowering the center and extending the joint of the knee to reduce an impact and assume stable posture at breakfall phase.
The purpose of this study was to analyze kinematic variable at the time of Judo obstacle forward rolling breakfall. To do so, three dimensional kinematic variable at the time of Judo forward rolling breakfall motions was calculated on five model males of Y university, and, time?C. O. G. variable were established. That was standardized using cubic spline interpolation based on the maximum motions time by calculating average value and standard deviation per each factor. As a result of this analysis, I reached following conclusion. 1. Time variable At the time of Judo forward rolling breakfall motions, the total required time was 0.93 seconds, and to describe per phase; at the second phase, air phase, 0.50 seconds(54%); at the third phase, completion phase, 0.36 seconds(38%); and the first phase, take-off phase, 0.08(8%) seconds. 2. Posture variables The angle of right·left knee joint·hip joint were extended at take-off phase, right·left knee joint were flexed, right·left hip joint did't exchange at air phase. The angle of right knee joint·right·left hip joint·were flexed, the angle of left knee joint was extended at safety breakfall phase. 3. C. O. G. variable Left(0.01m)·front(0.26m)·up(0.13m) moved at take-off phase, and left(0.09m)·front(1.46m)·up(0.32m) moved at air phase, and left(0.15m)·front(3.79m)·dawn(0.71m) moved at breakfall phase. In conclusion, all the subjects conducted bending and stretching exercise and made the center move for jumping higher at take-off phase, assumed motions to keep balance at air phase, and assumed motions for widening base surface by lowering the center and extending the joint of the knee to reduce an impact and assume stable posture at breakfall phase.
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