I really don’t see how that’s different from the current situation – play too hard and you’ll get concussed, so instead try to play up to but not beyond that. The differences are the actual cutoff level, and (I would imagine) the measurability. I’m picturing coaches saying “You’re allowed 5g [I’m totally making up this number], on my team I want all hits <4g for a cushion, on that hit you got 4.2g so tone it down some.”
