The WOD known as "Murph" started out as a CrossFit tribute to a fallen hero, but has since become a global phenomenon. Performed every Memorial Day, this event brings fitness communities around the world together to participate in what has become more than a just a workout. This Memorial Day, thousands of athletes across the country—many of them CrossFit devotees, but an increasing number who aren't—will partake in "Murph," a grueling ordeal that calls for you to perform a mile run followed by 1