Hitting balls from a pitching machine and pitcher in softball: case study

J. Carboch, P. Smejkalova
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Abstract

If a player faces a pitching machine, he/she cannot see some important cues before the ball release, which are available if the player hits the balls delivered from a pitcher. The aim is to find, if hitting balls delivered from a pitching machine or a pitcher affect the players swing timing in softball. This is a case study. The subject hit balls delivered from a pitcher and pitching machine. This action was recorded by a high-speed video camera (200 fps). The swing timing was significantly different in specific phases of the swing. The subject initiated her movement 0,24 s earlier when she faced the pitcher compared to the pitching machine (d = –0,90). T-tests revealed significant difference (p < 0,05) in the backswing and forward swing duration in the pitcher and pitching machine conditions. These differences show change in swing timing, which can affect he movement coordination. Because this is a case study, we can’t generalize the results, but coaches should be aware about these issues.
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从投球机和投手打垒球:案例研究
如果球员面对投球机,他/她在球释放之前看不到一些重要的线索,如果球员击中投手投出的球,这些线索是可用的。目的是发现,如果打击球从投球机或投手传递影响球员在垒球挥拍时机。这是一个案例研究。被试击出投手和投球机投出的球。这个动作被高速摄像机(200帧/秒)记录下来。在不同的摇摆阶段,摇摆时间有显著差异。受试者在面对投手时比面对投球机时早0.24秒开始运动(d = - 0.90)。t检验显示,投手和投球机条件下的后挥和前挥持续时间有显著差异(p < 0.05)。这些差异表现出摆动时机的变化,从而影响运动协调。因为这是一个案例研究,我们不能概括结果,但教练应该意识到这些问题。
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