You may think you're burned out at work, or with life in general. But what does burnout actually mean? Christina Maslach, Professor Emerita of psychology at UC Berkeley, was one of the first researchers in the world to study burnout, and co-created the Maslach Burnout Inventory over 40 years ago, a diagnostic tool that's still widely used today. She explains the distinct phases of burnout, why it's so pervasive in healthcare, and why a spa weekend isn't the cure.