>>218338 (OP)Buhurt, do buhurt. The helmets are heavy enough that it is very difficult to knock someone out and your main risk of brain injury is from falling wrong or being thrown hard on the ground- which doesn't happen that often. With striking disciplines, the likelihood that you go home with a pounding headache is quite high. I can do a full day of armored practice and go home with 0 concussions and maybe only a few hard impacts that might have jostled my brain a little bit, like football, etc.
That's the thing about buhurt though, you're not guaranteed to smack helmets with someone, it just happens sometimes. In football you are always gonna be smacking helmets or jostling your brain around when sacking or defending. In buhurt I have gotten into headbutt fights and that will ring your bell and you will get some of those mini concussions that when happen enough times cause CTE.
But it really comes down to how you choose to fight... If you study it and decide you want to do it, your best course of action is to bulk up and develop strong knees, back, ankles, shoulders, neck, wrists, etc. All those need to be strong because you are supporting an extra 80-100 lbs while fighting.