My understanding is that the problem isn't specifically related to the incidence of concussions, but rather more related to the continuous lower-level trauma to

My understanding is that the problem isn't specifically related to the incidence of concussions, but rather more related to the continuous lower-level trauma to the brain from hits during practices and games. That is why you see a lot of football teams at various levels switching to non-contact practices. https://www.technologyreview.com/s/421009/analyzing-hard-hits-on-the-football-field/ https://www.technologyreview.com/s/421009/analyzing-hard-hit...