Football participation among high schoolers continues to decline, as concern about brain injury increases. Could training without helmets make a difference?
Concussions in football and other contact sports correlate with severe, long-term brain damage — but science shows it doesn't have to be that way.
A recent study that showed that 110 of 111 brains of deceased NFL players had a serious brain disease raised concerns once again about concussions. But there's a lot we still need to know.