Boxers spend years taking punches to the head, and doctors think the accumulated head trauma leads to neurological diseases like Parkinson's.
MUHAMMAD ALI is probably the most famous example, but there are several former fighters who suffer from it.
But a gym in Indianapolis, Indiana called Rock Steady Boxing has turned things around . . . and is using boxing to HELP patients who have Parkinson's disease.
Scott Newman founded Rock Steady in 2006 . . . after he was diagnosed with Parkinson's at age 40. He thinks that giving patients a way to strengthen their muscles and stay in shape will help reduce the effects of the disease.
The patients don't hit each other during the classes . . . they work with punching bags. And most of them say that they've seen their symptoms ease since starting the classes.