Upon reading 'Healing Back Pain', I came to understand that it wasn't the sitting but rather built up stress and anxieties causing the pain.
Within 1 week of reading, my back felt 80% better. Within one month, 95%. Several months later, I'm now pain-free.
My girlfriend also experiences anxiety at times and had back pain that would come and go. She read the book and it cured her back, as well.
Admittedly, I found it very strange how effective this book was. I approached it hesitantly, but it has had profound results. Check the reviews on Amazon for further support.
This book has had a great impact on my quality of life and I highly suggest it to anyone experiencing not just back pain, but any physical ailment that might be tied to stress, anxiety, tension, etc.
One person who I trust said that once he reached certain page, his chronic back pain disappeared (just by reading the book). Apparently he is not alone. Maybe for some people chronic back pain is just fearing back pain and having tensing up or something.
I'm still very skeptical, but if the author is not selling anything except the book, maybe reading it is not so bad thing.
Here's a recent segment from the Howard Stern show if you want to hear a bit