Biomechanical analysis of Mawashi-geri in karate
Poster Presentation
Paper ID : 2050-SSRC
Authors
1بیومکانیک ورزشی، پژوهشگاه تربیت بدنی و علوم ورزشی، ایران، تهران
2مدیر عامل شرکت فناور ورزش فناور امید ابتکار، آمل، ایران
3استادیار، تربیت بدنی و علوم ورزشی، مرکز تربیت بدنی، دانشگاه صنعتی اصفهان، اصفهان
Abstract
Introduction: Among the key mechanical parameters related to scoring points in contact sports, force and time are important (1). The mawashi- geri (spin kick toward the head) has the highest score in karate, so it is used in karate competitions frequently (2). Hence the risk of head injury in karate-kas would be increase, likely. Both of force delivered to the head and the impact duration, are important parameters in predicting scull injuries (3). Therefore, the purpose of this study was the biomechanical analysis of Mawashi-geri in karate.
Methods: 15 female elite karate-kas (age: 28.16 ± 2.04 years, weight: 56 ± 3.26 kg, and height: 1.66 ± 3.27 m, mean±sd) participated in this study. a researcher-made artificial head equipped with a flexi-force sensor was used (4). The Subjects kicked it 5 times. A computer set was used to monitoring and record the data and processed in MATLAB software, then it compared with the scull injury threshold (3). The statistical method in this study was the t-test and the significance level of meaningful was p≤0.05.
Results: The average force delivered the head and its impact duration were found to be 600 N and 21 ms, respectively, which in comparison to the scull injury threshold (3) were significantly lower (3600N, t < 20 ms) )t= 1/62, p=0.03).
Conclusion: biomechanical analysis of this survey showed that the average force and impact duration of mawashi-geri, were lower than scull injury threshold. On the other hand, this blow cannot lead to scull injury in elite female karate-kas. It suggests that in future surveys some other related head injuries such as concussion would be considered.
Methods: 15 female elite karate-kas (age: 28.16 ± 2.04 years, weight: 56 ± 3.26 kg, and height: 1.66 ± 3.27 m, mean±sd) participated in this study. a researcher-made artificial head equipped with a flexi-force sensor was used (4). The Subjects kicked it 5 times. A computer set was used to monitoring and record the data and processed in MATLAB software, then it compared with the scull injury threshold (3). The statistical method in this study was the t-test and the significance level of meaningful was p≤0.05.
Results: The average force delivered the head and its impact duration were found to be 600 N and 21 ms, respectively, which in comparison to the scull injury threshold (3) were significantly lower (3600N, t < 20 ms) )t= 1/62, p=0.03).
Conclusion: biomechanical analysis of this survey showed that the average force and impact duration of mawashi-geri, were lower than scull injury threshold. On the other hand, this blow cannot lead to scull injury in elite female karate-kas. It suggests that in future surveys some other related head injuries such as concussion would be considered.
Keywords
Proceeding Title [Persian]
Biomechanical analysis of Mawashi-geri in karate
Authors [Persian]