背景與目的：過去臺灣原住民在棒球競技運動有傑出表現，但卻鮮有相關研究深入分析此議題。而過去雖已發現原住民兒童有較佳的基本動作能力或動作協調能力，卻未能在考慮專項運動訓練的情況下分析其動作能力之特性。故本研究目的在於分析接受規律棒球訓練兒童之動作協調能力之特性，並比較不同種族棒球男童動作協調能力之差異。方法：以近三年曾獲全國少棒錦標賽前三名之14所國小棒球隊作為受試者選取目標，共有152位11至12歲男童（85位原住民與67位非原住民）同意接受動作協調能力測驗（採用Movement Assessment Battery for Children，縮寫Movement ABC）。以單一樣本t考驗檢定棒球男童Movement ABC測驗的z分數是否顯著偏移於全國常模平均值，並以獨立樣本t考驗來比較不同種族的基本資料與障礙分數是否有差異。結果：棒球男童在手部操作靈活度、球類技巧與平衡能力面向皆顯著優於全國常模（p<.001）。而原住民棒球男童則僅在平衡能力面向顯著優於非原住民棒球男童，特別是在「跳躍拍手」項目（p<.05）。結論：優秀棒球男童之動作協調能力不僅會有專項特化的現象，也確實有較優異的表現。而原住民男童即使與非原住民男童接受相近的棒球專項訓練，仍發現原住民棒球男童有較佳的動態平衡能力。

Background and Purpose: The outstanding performance of Taiwanese aboriginal baseball players was well-known, but there were limited studies to investigate the issue in greater depth. Although a few studies had demonstrated that Taiwanese aboriginal children had better basic motor ability or motor coordination ability than non-aboriginal children, no study has analyzed characteristics of their motor abilities under the consideration of specific sport training. Therefore, the purposes of this study were to (a) analyze the motor coordination ability of boys who receive regular baseball training and (b) compare the motor coordination ability between aboriginal and non-aboriginal youth baseball boys. Methods: We recruited participants from 14 elementary school baseball teams which had won the top three in the National Youth Baseball Championships. A total of 152 boys aged 11 to 12 years (85 aboriginal and 67 non-aboriginal children) were assessed by the Movement Assessment Battery of Children (Movement ABC) test. The one sample t-test was used to verify whether the z-scores of baseball boys significantly deviate from the average of the national norm. The basic data and impairment scores between two groups were compared by the independent t-test. Results: Baseball boys had better performances in all domains, including manual dexterity, ball skills and balance ability, than the national norm (p<.05). In addition, the aboriginal baseball boys only had better balance ability than non-aboriginals, especially in the item of “Jumping and Clapping” (p<.05). Conclusion: Elite baseball boys had outstanding motor coordination ability which was shaped by baseball specific training. Even though all participants received regular baseball training programs, the aboriginal boys have better dynamic balance ability than the non-aboriginals.