A-36 Kinetic analysis of each hand in baseball batting motion : Influence of height of hitting point on kinetic variables

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  • A-36 野球打撃動作における左右各手のキネティクス的分析 : 打点高がキネティクス的変量に及ぼす影響(野球3(計測))
  • 野球打撃動作における左右各手のキネティクス的分析(打点高がキネティクス的変量に及ぼす影響)
  • ヤキュウ ダゲキ ドウサ ニ オケル サユウ カクシュ ノ キネティクステキ ブンセキ ダテン ダカ ガ キネティクステキ ヘンリョウ ニ オヨボス エイキョウ

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The purpose of this study was to clarify the influence of the hitting point height in the baseball T-batting motion by using an instrumented bat via inverse kinetic analysis. Sixteen collegiate male baseball players' motion were captured VICON 612 system (9-camera, 250Hz), and kinetic data at each hand were collected by using an instrumented bat equipped with 28 strain gauges (lOOOHz). Three heights of hitting point (high, middle, low) were set according to the baseball rules. We extracted coupled force components from forces exerted by each hand in the kinetic data. From the results we obtained the facts that the longitudinal force along the bat modifies the translational movement of the bat in the vertical direction during down swing phase, and that the coupled force, which is exerted by both hands about the axis of bat inclination, modifies the rotational movement of the bat to respond to the difference between the hitting point heights.

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