Effects of different throwing techniques in judo on rotational acceleration of uke's head

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    • Ishikawa Yoshihisa
    • Faculty of Education, Osaka Kyoiku University|Graduate School of Doctoral Program Human Development and Environment, Kobe University
    • Ono Takashi
    • Faculty of Health and Sport Sciences, University of Tsukuba
    • Okada Shuichi
    • Graduate School of Human Development and Environment, Kobe University


<p> This study aimed to clarify the rotational acceleration of the head of an uke during tai-otoshi, seoi-nage, osoto-gari, and ouchi-gari when safe ukemi is performed.</p><p> Eight judo club members of the National Institute of Technology (mean age, 17.5 ± 1.5 years; mean height, 173.0 ± 4.21 cm; mean weight, 72.4 ± 10.57 kg) were subjects who acted as the ukes. A subject with 8 years of experience in judo and qualified to the second dan (age, 20 years; height, 165.0 cm; weight, 70.0 kg) played the role of throwing the uke. A rotational velocity sensor was used to measure the rotational acceleration in the sagittal plane of the uke's head. One-way analysis of variance (Friedman test) was used for the statistical analysis, and when a significant difference was observed, multiple comparison test was performed using the Bonferroni method. The results revealed that of the four throwing techniques, osoto-gari generated maximum rotational acceleration of the uke's head. Furthermore, the maximum rotational acceleration was greater with tai-otoshi than with seoi-nage. Our results suggested that among the four throwing techniques, osoto-gari was most likely to injure the head.</p>


  • International Journal of Sport and Health Science

    International Journal of Sport and Health Science, 2018

    Japan Society of Physical Education, Health and Sport Sciences


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