to patdennis (apparently there is a max level of replies): I think you underestimate the amount of force an NFL player takes when they get hit. NFL helmets stop

to patdennis (apparently there is a max level of replies): I think you underestimate the amount of force an NFL player takes when they get hit. NFL helmets stop 99.9% of concussions. If a cyclist wore one they would not get a concussion falling off their bike at 20 km/h or even getting hit by a car. NFL players get concussions because big collisions between players are more similar to getting in a "severe car accident"[1] which is tougher to guard against. [1] http://www.inreview.com/archive/topic/14556.html http://www.inreview.com/archive/topic/14556.html