As Dr. Jordan Metzl says, "Exercise is medicine." It's the simplest way to keep yourself healthy and happy. Now he puts that philosophy into a groundbreaking book split into three sections. First, an AZ list of maladies that affect quality of life for millions, along with the specific exercise prescriptions that will help fix them—from Type 2 diabetes to depression, from arthritic joints to PMS, from addiction to sleep apnea. Second, a doctor-approved eating plan to fuel fast weight loss and great workouts. And most important of all, an exhaustive (and exhausting) collection of fun, fat-torching, life-changing workouts that can be tailored for any fitness level.