Influence of Datotsu in Kendo on the Human Head :Impact Estimation Using Simulation with Crash Dummy

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  • 剣道における打突が人体の頭部に及ぼす影響について―ダミーを用いたシミュレーション実験―

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To clarify, from a biomechanical viewpoint, the impacts on men and tsuki transmitted through the Kendo protective gear to the human body, this study attempted to measure changes in accelerations in attacks to the head of dummies and actual human subjects, and to investigate the safety of the Kendo headgear (men) in protecting the human head based on the JARI human head impact tolerance curve.<br>The following results were obtained:<br>1. A men attack at the distance of one step and one attack (issoku itto) has the lowest possibility of damage by acceleration among the three patterns of attack because of the low acceleration level.<br>2. A single impact to the head is not serious enough to cause damage such as a cranial fracture or cerebral concussion. However, because continuous or long-term impacts could cause chronic subdural hematoma, further investigations are necessary.<br>3. The thrust action has low possibility of head damage due to acceleration because the acceleration level is low.

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