지각적 관찰학습을 통한 야구 피칭 동작의 운동학적 분석 : 운동 타이밍과 수행 정확성 중심으로

Abstract

The purpose of this study is to compare the changes in performance according to the speed of playback of the video on overarm-pitching learning. 25 novice subjects were assigned into five groups (control, 33%, 66%, 100%, 133% speed conditions relative to the actual playback speed). After observing each video for 10 minutes, all subjects performed a task of throwing a baseball to the target as fast as possible. For comparison of learning effect, movement time and radial error were measured. The 66% video playback speed group showed that the tempo was reduced during the wind-up phase. However, the 133% video playback speed group showed that the tempo was increased in stride phase. With the change in motor timing, the 66% and 133% groups exhibited reduced spatial accuracy. In conclusion, the motor tempo has been effected depending on the level of video playback speed. However, internal rhythm was hard to change by observational learning in the early stages. And, large difference in playback speed with the actual video had no significant changes in motor timing. Consequently, the tempo of the movement and the different levels of perceptive speed must be considered in learning the timing.