When you go for a walk with your friends and family - are you a few paces ahead? Or a few paces behind? Well, if you're not in the mood for a physical or a PET scan, but you'd still like a rough idea of how you're holding up, the speed at which you walk is a strong predictor of your longevity. Dr. Stephanie Studenski from the University of Pittsburgh studied the elderly to see how fast they walked. The faster someone 65 and older walked, the longer he or she could expect to live. The Boston Globe reviewed the study and said the difference was dramatic. 75-year old fast walkers had a nine in ten chance of living another 10 years. The 75-year olds who walked the slowest had only a one in five chance of living another 10 years. If you're already a senior, you can't cheat death by consciously trying to hurry up. It needs to start long before that. You need to pick up the pace while you're still able. For that, here are a few tips from the book The Complete Guide to Walking: Take smaller, quicker steps. Not longer strides. You burn more calories taking shorter steps. Longer steps will just exhaust you more quickly because it's unnatural. Also, try to swing your arms faster. That'll help you walk more quickly. In fact, people who don't move their arms, tire more quickly.Just something to keep in mind the next time you're out for a stroll.