[請益]投球速度加強
先附上我的測速影片
http://youtu.be/S2VkLlfjW34
目前極速120 姿勢就覺得怪怪的 不知道有哪些地方可以改進?
希望有生之年可以測到125 謝謝
ps. 我有在重訓 需要加強哪邊的肌肉呢?
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※ 編輯: h15921209 (101.139.164.6), 04/13/2016 14:38:19
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