如何讓我的棒球直球變的更快呢 - 健身
By Dorothy 
at 2008-04-13T00:00
at 2008-04-13T00:00
Table of Contents
我16歲,177公分62公斤,最高球速130,平均球速98-100,玩棒球4個月,想投出更快的球應該如何訓練
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