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Notes -
Yeah, I'd agree that linemen are certainly getting the short end of the stick. The only mitigation is that they only start a foot apart so they're not slamming into each other at full speed. For everyone else it's probably comparable. But both rugby and football are on another level compared to light-contact sports like soccer.
A lineman generates a lot of force inside that foot, and do it again and again and again and again. I'd be shocked if the vast majority of head trauma in the NFL didn't take place during blocking as opposed to tackles, if only since the average play will have what 2 or 3 players involved in 'tackling/being tackled' and like 15 players blocking/being blocked.
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