Strokes can be debilitating at best, deadly at worst. But for those who've survived a stroke, new research shows that there is one important thing they can do to help their brain facilitate positive changes: Exercise. And we're not talking about running weekly marathons here--walking on the treadmill as little as three times a week can significantly improve mobility and physical conditioning.

What's more, patients don't need to start an exercise regime immediately after their stroke -- Starting a workout program any time after a stroke was beneficial. In fact, one patient showed improvement after exercising 20 years after his stroke.

Man, is there anything a good workout can't do?