Football. You are guaranteeing brain
http://www.ucdmc.ucdavis.edu/ucdavismedicine/issues/winter2015/features/concussion.html
Q: Do you think CTE can be either prevented or cured in football and collision sports someday?
A: Until you can definitively diagnose CTE in living people, you cannot test different modalities of management. You may not cure it, but at least control it like you can control HIV. From a business perspective and a leadership perspective, given the intellectual capacity of Americans, we will identify some modality of treatment soon. But until we do, prevention is the best cure.
I hear some people say “take the head out of the game.” Do you think you can play football without the head? Another fallacy, they tell you we are looking at helmet technology. Helmets do not prevent concussions or subconcussions. In fact the helmet increases the mass of the head and the momentum of impact, therefore larger amounts of energy are being transferred to the brain.
And I start to wonder, these are such basic concepts, why aren’t we figuring it out as a society? The only answer is that we are intoxicated by this subculture of violence.