I had back pain for 1 year. I read this book and the pain went away within 1 week. Sarno is a genius and his principles can be applied to much more than back pain. There is one requirement - YOU MUST HAVE AN OPEN MIND - if you do it is guaranteed to work - why ?? Because it is nearly impossible to injure your back. I suggested this book to a friend who has suffered from severe back pain for 3 years. Of course he was diagnosed with a herniated disc. He was afraid to do any activity. When he spoke about his back he referred to it as his "Broken back". That was before he read the book. Now he is fine, able to work hard and play hard. It's simple, tension causes pain and we keep lots of tension in our back muscles....LET IT GO!