Many people feel that exercise will make their pain worse, or lead to more damage. On the contrary, exercise can have the opposite effect, especially for low back pain. Mark Sisson joins us today. He’s made health and fitness his life’s work.  Mark’s the author of, The Primal Blueprint, he blogs at Mark’s Daily Apple, and he’s an advocate for the Paleolithic diet. We’ll get some practical suggestions on using fitness and diet to ease low back pain, arthritis, irritable bowel syndrome, and much more.