I want to keep fighting because it is the only thing that keeps me out of the hamburger joints. If I don't fight, I'll eat this planet. George Foreman
I had polio when I was 13. I started feeling stiff, my joints ached, and over a two-week period I lost my coordination and 20 pounds. Jack Nicklaus
Marathons are hard because of the physical pain, the pounding on the muscles, joints, tendons. Lance Armstrong
Unlike running on a road or concrete, natural surfaces are more forgiving and offer a more varied terrain, ultimately resulting in less repetitive micro-trauma to bones and joints than running on hard pavement does. Dean Karnazes