brain disease

One spring morning in 2015, Barbara Lipska got up as usual, dyed her hair and went for a jog in her suburban Virginia neighborhood.

But when she returned from a much longer than expected run, her husband Mirek was completely taken aback.

"I was lost in my own neighborhood," Lipska says. "The hair dye that I put in my hair that morning dripped down my neck. I looked like a monster when I came back home."

As the country starts to get back into its most popular professional team sport, there is a reminder of how dangerous football can be.

An updated study published Tuesday by the Journal of the American Medical Association on football players and the degenerative brain disease chronic traumatic encephalopathy reveals a striking result among NFL players.