article about college football practice being a bigger cause of concussions than games (below). i know some coaches, like the butte high guy (high school, obviously) conduct no-contact or low-contact practices only, and still are very successful (someone please correct me on that if i'm wrong). Anyways, here's the article: https://www.nytimes.com/2021/02/01/sports/concussions-college-football-practice.html