With Fitness After 40, regain the energy and physique of a teenager in no time. Your body is getting older, those stairs are looking steeper, and your bones are cracking louder. The unavoidable fact is that your body is aging. However, that doesn't have to impact your fitness level. Forget how many candles were on your last birthday cake--if you exercise smarter, you can remain youthful, energetic, and strong. As an...