Identification of the roles of wrist snap in baseball pitching

识别扣腕在棒球投球中的作用

• 批准号: 24700692
• 负责人: JINJI Tsutomu
• 金额: $ 2.58万
• 依托单位: International Budo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24700692/
• 关键词: 投球; スナップ; エネルギー; マルチボディダイナミクス; ボールスピン; 野球; ピッチング; 二重振り子; エネルギーフロー

Some studies have reported that movements of forearm and wrist has several rolls to perform a baseball pitching. However dynamical mechanism are still unclear. As a step toward understanding the rolls of forearm and hand in baseball pitching, we investigated how non-muscular forces of the each link generates, absorbs, and transfers mechanical energy in order to produce maximum velocity. The mechanical energy of the hand was supplied the non-muscular force, which is governed by the centrifugal force of the forearm. However, the muscle torque of the wrist absorbs the mechanical energy of the hand. It is concluded that only the wrist cannot generate a high ball velocity. The wrist, therefore, is equipped with a self-defense mechanism and provides a relatively stable base for extrinsic finger control. It is also thought that the wrist joint have a roll to apply spin a ball. The wrist joint may contribute to the rotational velocity and not the translational velocity of a ball.

一些研究表明，前臂和手腕的运动需要多次滚动才能进行棒球投球。然而动力机制仍不清楚。作为了解棒球投球中前臂和手的滚动的一步，我们研究了每个链接的非肌肉力如何产生、吸收和传递机械能以产生最大速度。手的机械能由非肌肉力提供，该力由前臂的离心力控制。然而，手腕的肌肉扭矩吸收了手的机械能。结论是仅靠手腕无法产生高球速。因此，手腕具有自卫机制，为手指的外在控制提供了相对稳定的基础。人们还认为腕关节具有滚动以施加旋转球。腕关节可能有助于球的旋转速度而不是平移速度。

项目成果

Multi-bodypower analysis of kicking motion based ona double pendulum

基于双摆的踢球运动多体动力分析

• DOI: 10.1016/j.proeng.2012.04.038
• 发表时间: 2012
• 期刊: Procedia Engineering
• 作者: H. Ozaki;K. Ohta;T. Jinji
• 通讯作者: T. Jinji

投球動作解析におけるサンプリング周波数とデータ平滑化手法の検討

俯仰运动分析中的采样频率和数据平滑方法研究

• 发表时间: 2012
• 作者: Ozaki;H.;Ohta;K.;Jinji;T.;神事努;神事努
• 通讯作者: 神事努

投球動作解析による投球フォーム及びボールの評価

通过投球运动分析评估投球形态和球

• 发表时间: 2013
• 作者: Ozaki;H.;Ohta;K.;Jinji;T.;神事努
• 通讯作者: 神事努

Multi-body power analysis of the baseball pitching based on a double pendulum

基于双摆的棒球投球多体动力分析

• 发表时间: 2012
• 作者: Jinji;T.;Ohta;K.;Ozaki;H.
• 通讯作者: H.