目前與鋼琴彈奏相關之研究多以流行病學議題為主，為能更完整地瞭解鋼琴彈奏之傷害機制，本研究之目的為應用客觀量化之生物力學方法，探討手距(hand span) 大小對彈奏和絃及八度音樂曲時之運動學差異，並探究左右手在彈奏時之運動學表現，以期將研究結果與臨床應用做結合。本研究招募十六位鋼琴彈奏者，所有受測者皆需接受手距大小之標準量測，及重複彈奏指定之和絃及八度音樂曲片段各五次。彈奏時使用三維動作分析儀捕捉手部三維資料，並計算出最大指間外展角度比值、指關節之屈曲伸展活動度及指關節之屈曲伸展動作單元等運動學參數。結果顯示，大手距與小手距組於彈奏和絃及八度音時，最大指間外展角度比值達到顯著之統計差異。兩組在指關節屈曲伸展活動度上較無顯著差異。但就左右手之各指指關節屈曲伸展動作單元，右手顯著大於左手。故小手距者於彈奏和絃及八度音時，易有手指過度外展現象，推論此可能易導致手部相關內在肌群傷害的產生。此外，右手於彈奏樂曲時，比起左手有更多不自主的手指預備彈奏動作產生，此呼應右手較易產生傷害之論點。本研究由手部動作表現解釋相關疾病之成因，期可提供臨床診斷、介入及音樂教育上實值之運用。

Current studies regarding playing-related injuries of pianists focus on epidemiologic issues. To understand the injury mechanism associated with pianists, this study attempted to investigate kinematic performances of hand during piano playing under different perspectives in ergonomics(hand span and right/left hands)and playing-skills(chord and an octave).
Sixteen female pianists passed through the hand span screening were recruited and requested to play the assigned techniques. The kinematic parameters, such as the ratio of maximal digit-to-digit abduction angle, the flexion-extension(F/E)range-of-motion(ROM)of finger joint, and the movement unit of F/E of each finger joint were obtained via the motion capture system and custom programs. The results showed significant difference of the ratio of maximal digit-to-digit abduction angle between large and small hand span pianists while playing both chord and octave. The F/E ROM of finger did not show significant difference between these
two groups when playing the techniques. The movement unit of F/E of each finger joint of the right hand was significantly larger than the left hand. The small hand span pianists use wider finger abduction to play the chord and octave. In addition, the right hand presented more movement units than the left hand did so that it indicated the right hand have more chances of the unconscious movement to prepare for the playing performances. This study concluded that the small hand span and the right hand side might be the risk factors to result in some playing-related injuries of the hand.