[privong]

I think it is more complicated than that, because the impact speed is important too. The linemen come at each other from close distances. So they may not build up as much speed, compared to a situation such as a linebacker with a running start towards a running back.

[Retra]

Impact speed is important to the effectiveness of a collision. That's why they train to maximize this speed. Saying "the speed isn't high" in a context where maximum speed is a goal isn't a very good argument for safety.

I mean, if I were an exceptionally speedy, brick-wall linebacker, I wouldn't get kicked out for causing extra concussions, I'd be given trophies and expensive contracts.

[privong]

> Impact speed is important to the effectiveness of a collision. That's why they train to maximize this speed. Saying "the speed isn't high" in a context where maximum speed is a goal isn't a very good argument for safety.

I think you are conflating speed and quickness. Offensive and defensive lines rely on quickness (i.e., acceleration) to beat the opposing team and make a play, while other collisions (e.g., tackling) often involve speed.

I am not saying that linesmen should not be expected to sometimes suffer head trauma; I was just noting that how often a player runs into another player is not the only factor.

[Retra]

I'm not conflating anything, I'm using standard physics terms. If you want to trample over the defense you need momentum, which is a function of speed.

Sounds to me like you're arguing for no reason.

[judk]

Or you need to get to a desired position first,which is a function of total time, not top speed.