Over time, walking incorrectly can lead to conditions like sciatica, bulging discs, disc pain and other degenerative spine disorders. You can tell whether or not you are an overpronator, a condition of walking where you shift your weight from heel to the forefoot when walking or running, by looking at your shoes from behind. You'll find excessive wear on the inner side of your shoes — notice the wear pattern on your heels —and they'll tilt inward when on a flat surface...