My brother is 25 and works out 4 times a week and while he is not huge he is in pretty decent shape. He just got out of surgery to repair the break as it was a spiral fracture and the bone was growing apart instead of coming together. Doc said he would never be able to fully extend his arm and may have some radial nerve damage as they had to move it to repair the break. I work in the medical field as a registered nurse but the injury and the lasting effects of it from just arm wrestling kind of shocked me. Makes me think before arm wrestling that's for sure.
