This is like someone who Google'd something telling a person who experienced it and was in that environment that they're wrong. I have physically been on the field playing against Nebraska when they were Nebraska. I have played against Big 10 squads. I was physically on the field trying to get paws on
Jeff Smoker. I have personally tried to put my facemask through Carson Palmer's chest. I have collided directly with Steven Jackson at Oregon State. I know what it actually feels like to try and chase down Steve Smith Sr. (For anyone that cares he was FAST). I have had multiple teammates get drafted in the first round. You are not in any position to me of all people how the psychology of football works nor it's effects on the human body including the brain. I did it and then spoke to actual specialist about it and spoke to my teammates about it. A study you googled or having a cousin that did it ain't gonna make you more informed than me. Have a good day man.