|From NatGeo: Red = Collision greater than 80g and Black = Concussion|
The powerful visual underscores the dangers of football at any level. Seemingly insignificant head collisions add up to severe potential for brain damage later in life. So many former NFL players suffer from early onset dementia that many decided to donate their bodies to science to get a better understanding of what actually happens to the brain.
Hopefully these studies can help us prevent more problems in the future through acceptance of rule changes and better technologies.