it seems like your hand is in the same stressed position for too long so the muscle might had injured way before you noticed...
0 w' K+ W$ k; |4 S4 Vtvb now,tvbnow,bttvbPedestrian_A 發表於 2016-9-25 09:29 AM 
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You maybe right!! Because, statistically, it happens to gymnasts more often!!!
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