Biomechanics of judo backward breakfall for different throwing techniques in novice judokas |
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| Authors: | Sentaro Koshida Takanori Ishii Tadamitsu Matsuda Toshihiko Hashimoto |
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| Institution: | 1. Faculty of Health Sciences, Ryotokuji University, Urayasu, Japankoshida@ryotokuji-u.ac.jp;3. Centre for Liberal Arts Education, Ryotokuji University, Urayasu, Japan;4. Faculty of Health Sciences, Uekusa-Gakuen University, Wakaba-ku, Japan;5. Faculty of Health Sciences, Ryotokuji University, Urayasu, Japan |
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| Abstract: | It is generally accepted that proper learning of the breakfall technique during early judo training is essential for attenuating the risk of judo-related head injury. Therefore, it is critical to understand the kinematics and head injury risks of breakfall motion to design a more safe and effective judo teaching paradigm that results in reduction of injury risk. We aimed to investigate the biomechanics of judo backward breakfalls by comparing osoto-gari and ouchi-gari in novice judokas. Twelve male novice judokas (age: 21.3 years, SD?=?0.6 years; height: 1.74?m, SD?=?0.04?m; body weight: 71.3, SD?=?6.4?kg; body mass index: 23.5, SD?=?2.3) volunteered to participate in this study. The kinematic data of the breakfall motion for both osoto-gari and ouchi-gari were collected using a three-dimensional motion analysis technique (200?Hz). We observed significant differences between the movement patterns for the two techniques, especially in the lower extremity movements. In addition, a significantly greater peak extension momentum (osoto-gari: 1.29, SD?=?0.23?kg?m2?s?1; ouchi-gari: 0.84, SD?=?0.29?kg?m2?s?1) and lower head position along the vertical axis (osoto-gari: 0.18, SD?=?0.05?m; ouchi-gari: 0.31, SD?=?0.08?m) with a large effect size were found in the breakfall for osoto-gari. Our results suggest that a different paradigm is needed for effectively teaching each breakfall technique that will enable us to substantially lower the risk of judo-related head injuries in novice judokas. |
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| Keywords: | Biomechanics injury and prevention coaching |
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