The purpose of this study was to investigate a baseball catcher’s throwing time to second base using three throwing motion types. The subjects were professional (n = 4) and college (n = 12) baseball catchers. Two high-speed cameras were set to capture the throwing motion, while one was set to capture the net on second base. The throwing time of quick throw (throwing motion to release the ball immediately after catching the ball rather than usual throwing motion) was significantly shorter than those of usual throw (throwing motion used during games and practice) and fast ball throw (throwing motion to increase the ball velocity than usual throwing motion). From this result, it became clear that quick throw is the optimal throwing motion when judged by time. Thus, with respect to correlations between variables, there were significant positive correlations between throwing and motion times (usual throw: r = 0.760; fast ball throw: r = 0.719; quick throw: r = 0.767), and between throwing and airborne times (usual throw: r = 0.784; fast ball throw: r = 0.744; quick throw: r = 0.806), for all three throwing motions. However, negative correlations were shown between throwing and release times in usual throw and fast ball throw. The results suggest that, to shorten the throwing time, it is necessary to shorten the hold and stride times and to improve the ability to throw the ball as fast as possible with a shorter motion time.

中文翻译：

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棒球接球手向二垒投掷动作的时间分析：三种投掷动作的比较

本研究的目的是使用三种投掷动作来调查棒球接球手投掷到二垒的时间。受试者是职业 (n = 4) 和大学 (n = 12) 棒球接球手。两台高速摄像机用于捕捉投掷动作，另一台用于捕捉二垒的球网。快投（接球后立即出手的投球动作，而不是通常的投球动作）的投球时间明显短于普通投球（比赛和练习中使用的投球动作）和快球（投球动作增加的投球动作）的投掷时间。球速度比通常的投掷运动）。从这个结果可以清楚地看出，从时间上判断，快速投掷是最佳投掷动作。因此，关于变量之间的相关性，投掷次数与运动次数（通常投掷：r = 0.760；快投球：r = 0.719；快投：r = 0.767）、投掷次数与空降次数（通常投掷：r = 0.784；快球）之间存在显着正相关投掷：r = 0.744；快速投掷：r = 0.806），对于所有三个投掷动作。然而，在普通投掷和快速投掷中，投掷和释放时间之间显示出负相关。结果表明，要缩短投掷时间，就必须缩短持球时间和跨步时间，并以更短的动作时间尽快提高投球能力。对于所有三个投掷动作。然而，在普通投掷和快速投掷中，投掷和释放时间之间显示出负相关。结果表明，要缩短投掷时间，就必须缩短持球时间和跨步时间，并以更短的动作时间尽快提高投球能力。对于所有三个投掷动作。然而，在普通投掷和快速投掷中，投掷和释放时间之间显示出负相关。结果表明，要缩短投掷时间，就必须缩短持球时间和跨步时间，并以更短的动作时间尽快提高投球能力。