You've probably brushed off leg pain more than once. A little cramp after a long walk, a heaviness in your calves by evening, most of us file that under "getting older" and move on. But according to the American Heart Association, that instinct to shrug it off is exactly what lets a serious condition slide under the radar for millions of people.The condition is called PAD (peripheral artery disease) and it's essentially the leg's version of a heart attack or stroke. What is the best time to take