This app is intended as a jump off point for athletes to systematically begin to address their nasty tissues and grody joint mobility. Be cool. Use at your own risk and stop if you think it’s gonna hurt you, your spine is going to come out your throat, or your face goes numb. But, understand that you should be responsible for your own business. Don’t wait until you need a new knee. Pony up.Coach Kelly Starrett received his Doctor of Physical Therapy in 2007 from Samuel Merritt College in Oakland, California. Before starting his own physical therapy practice at San Francisco CrosSFit, one of the first 50 CrossFit affiliates, he practiced performance-based physical therapy at the world-renowned Stone Clinic.Kelly’s clients have included Olympic gold-medalists, Tour de France cyclists, world-class extreme skiers and X-Games medalists, dancers with Smuin, San Francisco, and Sacramento Ballet Companies, military personnel, and competitive age-division athletes.