Don't listen to the guy who says he is a martial artist. He was being negative, and didn't even include a measure of credibility such as his name, or martial arts of practice to back up his negative claim.
If you want to look at a sample of this book, go to Google books, and you can read the first 20 or 30 pages. when you do that you'll understand why this book can help you prevent back pain.
Everyone from Construction workers to those who sit in an office every day need to use this book. This book is a tool, that i use instead of going to the chiropractor, which i have now learned is useless, and perpetual.
I bought this book after reading some of the pages on Google books. I really liked the fresh approach to back pain, which chiropractors had not been able to help. The chiropractor i had attended would help my pain go away, and as if i was leaving a barber, or a gas station tell me to come back soon. The visit cost $75 each time i visited. I visited every other week, and sometimes once a week depending on weather i was working as a computer technician, or helping my father with some manual labor as part of his construction, and renovation company.
As i read this book i learned that your back and neck are not supposed to go out all the time, and this book taught me how to stretch properly so that my back wouldn't go out as much.
The thing that i didn't understand was that the stretches not only stretch your muscle, but they align your back while you are doing them, which is the same thing my chiropractor did, only he used an electrical stimulator to loosen my muscles, which did not strengthen them.
This book has helped me more than i thought possible. I didn't buy from amazon, i wanted to tell others what this book has done for me. I haven't been to the chiropractor in 3 months.