There are no coclusive studies. The studies by the American sports Institute have shown that there are links to over use and age related risk but you don't have to be a genious to figure that out. Dr Andrews is careful not to say CBs are a the cause of arm injury. This is tipical knee jerk reaction by BB Canada. They already limit you to 3-4 inniongs before M Bantam. The answer is to educate coaches on the factors that can contribute to arm injury. The 1st and foremost factor is ignorance.
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