Comparison of kinetic parameters of upper extremity between fastball and curveball pithes

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  • ストレートとカーブの投球動作の運動学・動力学解析
  • ストレート ト カーブ ノ トウキュウ ドウサ ノ ウンドウガク ドウリキガク カイセキ

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Abstract

This study aimed to compare fastball and curveball pitches according to the resultant forces and moments of the shoulder and the elbow joints. We used four rigid body models in a kinetic analysis of the upper-body, and estimated the resultant joint forces and moments of the wrist, elbow and shoulder, using the inverse dynamics technique. Fastball pitching speeds were significantly faster than those for curveballs, for all subjects. The movement of the hand and forearm between fastball and curveball are almost similar without the movement of hand and forearm. The force and moment of the shoulder during fastball pitch are larger than the curveball pitch slightly. The share forces of the elbow during curveball pitch are larger than the fastball pitch slightly.

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