A neurodegenerative disease is affecting many former athletes. Symptoms of this condition can include problems with memory and impulse control, as well as anxiety and depression. It is often found in people who have experienced repeated head trauma, such as those who play contact sports.

This condition can only be confirmed after death. Researchers have been studying its impact on former National Football League players.

Further information about the study's findings is available, including the estimated percentage of former players who were affected by this condition.