Conversation so far:
helmets were designed to protect players from what
Today's professional helmets are primarily made by two companies: Riddel and Schutt. Both manufacturers have released helmets designed specifically to protect against concussions.
how well are football players protected from concussions with helmets
A new study finds that football helmets currently used on the field may do little to protect against hits to the side of the head.

Question: how often do players get hit
Self-contained rewrite: how often do football players get hit in the head