@mattstigler: Put your bias to the side and use your eyes. Heels and back of foot decel linear sprints. This is not the only visual I have. I have hundreds more. And once you accept this truth you can realize that every part of your foot has a purpose. Heel strike while you accelerate is a bad idea. Heel strike during slowing down/change of direction is good. All about context. Something fascia nature boys do not have the brain power to understand. Enjoy