If you've been lucky enough to go without a back injury, like a pinched nerve, torn ligament, or some other type of injury, you probably know of someone who has been laid up from back pain, right? It's debilitating and can keep you in bed for long periods, away from work, and making several trips to the doctor. The goal is to prevent back injuries before they happen, so in this course, we'll start by looking at the structure of the back and how it works.