如何才能讓球速變快? - 健身
By Damian
at 2010-08-18T00:00
at 2010-08-18T00:00
Table of Contents
我國小要升國中,希望自己的球速可達到110公里以上,請問要如何訓練呢?還有要如何才能讓控球變好另外球質是什麼?什麼是正確的投球姿勢?
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健身
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