Effects of Different Modes of Preparatory Motion on Dart-Throwing Performance

Abstract Preparatory motion (consciously or unconsciously moving a body part just before performing a task) enhances motor performance. Repeated body movements are roughly categorized as rhythmic and discrete. However, the most effective mode of preparatory motion remains unclear. The present study utilized both modes of preparatory motion and compared subsequent performances. Twelve participants executed dart throwing after performing rhythmic, discrete, or no preparatory motion. Performance was statistically evaluated by comparing the error components, assumed contributions of each mode of preparatory motion. The results revealed that the mean value of the error component for the rhythmic mode was significantly smaller than that for the discrete mode. This suggests that the rhythmic mode of preparatory motion produced better dart-throwing performance.