[請益] 投球姿勢討鞭
因為電池不夠所以只拍了背面...
之前好像有聽說手肘不夠高很容易受傷
但我算是4分之3側投的
手肘還需要再高一些嗎?
我有個側投的朋友十字韌帶就拉傷了...
還有我發現右投從左邊拍會有總很奇妙的感覺...
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