本研究目的探討棒球選手能否藉由進行學者Moriyasu (2018)所提出的Standing Pole Exercise (SPE)來提升胸椎活動的角度，以此增加軀體扭轉角度，進而幫助其打擊表現。方法：19名男性棒球運動員，採隨機分組分成控制組 (N=9名，年齡：20.56±1.13)與介入組 (N=10名，年齡：21.20±1.93)，控制組進行8周常規的棒球訓練，介入組則額外進行每周4次持續8周的SPE訓練。並在介入前後收集胸椎活動度、打擊運動學參數以及擊球表現 (擊球初速、揮棒速度)，數據以獨立樣本T檢定以及成對樣本T檢定進行分析。結果：介入組在左側胸椎角度達顯著進步以及兩組在兩側的活動度變化量 (△)達顯著差異 (p<.05)；介入組的低活動度者也在左側胸椎角度達顯著進步 (p<.05)。軀體扭轉角度的部分，控制組在前腳離地時的肩膀角度以及軀體扭轉角度有顯著進步 (p<.05)；介入組在擊球瞬間時的骨盆角度達顯著進步 (p<.05)；低活動度者在前腳離地時的肩膀角度以及骨盆角度達顯著進步 (p<.05)。在打擊表現的部分，介入組在揮棒速度上顯著進步 (p<.05)；兩組的擊球初速在前測及後測皆達顯著差異 (p<.05)；低活動度者在打擊表現雖有進步但未達顯著差異。結論：SPE訓練能夠有效提升胸椎活動度且對原先活動度較差的效果更明顯；軀體扭轉角度受胸椎活動度的改變影響不明顯，需要更多樣本數去驗證；打擊表現受個體差異影響較大，無法看出與軀體扭轉角度的關聯性。

The purpose of the study was to find whether eight weeks of standing pole exercise for baseball batters can improve thoracic mobility, increase trunk twist angle, and influence batting performance. Method: Nineteen male baseball batters were randomly assigned to control (CG, n=9) and intervention group (IG, n=10). The two groups had their normal practice during eight weeks, and IG had to do the additional thoracic mobility training four times a week in the meantime. The thoracic mobility angle, trunk twist angle and batting performance data in pre- and post-test were analyzed by an independent sample t-test and paired samples t-test. Result: IG had significant improvement in left thoracic mobility, and the change of both side mobility was significantly different from CG. The low mobility in IG also had significant improvement in left. In trunk twist, CG had significant improvement in shoulder and trunk twist angle on lead foot off the ground. IG had significant improvement in pelvic angle on ball contact. The low mobility in IG had significant improvement in shoulder and pelvic angle at lifting of the lead foot. The exit speed in pre- and post-test had significant difference in the two groups. IG had significant improvement in batting speed, but the low mobility in IG did not have. Conclusion: The standing pole exercise could effectively improve thoracic mobility angle with more obvious effect on those with low mobility. More participants will be needed to certify the influence of thoracic mobility on trunk twist angle and batting speed.

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