I have tried to take up running time and again in the past decade or so, and my efforts have always been rewarded not just with failure, but also with overuse injuries, achy knees, and stress fractures.  A normal person would probably give up, but I am blessed and cursed with this Pollyanna sense of optimism about my physical abilities.  I'm sort of the opposite of a hypochondriac, possessed by the notion that every ache and ailment is no big deal and can be fixed by hard work and better living. (It's a sickness really... just ask my friends and family and co-workers.)  So, in my most recent bid to overcome gravity, inertia, and my obvious physical limitations and transform myself into a runner, I decided to start totally from scratch, by walking barefoot-ish a couple days a week in my Vibram FiveFingers.  Forgive me if this starts to sound a bit like an infomercial, but I think I'm onto something.  My knees, hips, ankles and feet feel better than they have in years.