Abstract

Despite the well-known tradeoff between speed and accuracy, skilled people often demonstrate the ability to maintain high accuracy during fast movements. We focused on two strategies to improve accuracy, thereby increasing the reproducibility of individual parameters (certain parameters are maintained in low variability) and coordinating covariation among parameters (different parameters compensate each other's variability). The objective of this study was to determine whether coordinated covariation among release parameters is used for high accuracy by skilled baseball pitchers. A model was employed to simulate pitch location after eliminating the coordinated covariation by randomly reshuffling the release parameters, and the variability of simulated and measured pitch locations were compared. The results showed that there was no significant coordinated covariation for any of the release parameters for either the vertical or horizontal pitch location supports strategy of increasing the reproducibility of individual parameter. In addition, for the vertical pitch location, because there was coordinated covariation between the release angle and speed in slow pitching, it was suggested that, the higher speed the task requires, the more important the reproducibility of individual parameter becomes.

摘要

尽管在速度和准确性之间进行了众所周知的权衡，但技术熟练的人经常表现出在快速移动过程中保持高精度的能力。我们专注于提高准确性的两种策略，从而提高单个参数的可重复性（某些参数保持低变异性）和协调参数之间的协变（不同的参数相互补偿彼此的变异性）。本研究的目的是确定释放参数之间的协调协变是否被熟练的棒球投手用于高精度。通过随机改组释放参数消除协调协变后，采用模型模拟音高位置，并比较模拟和测量的音高位置的可变性。结果表明，对于垂直或水平俯仰位置的任何释放参数都没有显着的协调协变，支持提高单个参数再现性的策略。此外，对于垂直俯仰位置，由于在慢速俯仰中释放角度和速度之间存在协调的协变，因此建议任务要求的速度越高，单个参数的再现性就越重要。