A lineman who plays in high school, college and the pros may retire with 10,0000 sub-concussive hits, none of which were diagnosed, none of which he is aware of. The aggregate of these hits produce brain damage much more severe than being knocked out three times.
Prominent neurologists and researchers like Robert Cantu, Julian Bailes, Kevin Guskiewicz, Kristen Willeumier and David Hovda report that three or more concussions may lead to exponentially higher rates of Alzheimer’s, ALS, dementia, chronic traumatic encephalopathy and depression. This is different from other injuries. Brain function provides memory, judgment, and personality — what it means to be a sentient human being. That is why we are forming a new foundation, “Athletes Speak,” with players advocating awareness and prevention.