maybe

Found some websites for you:depends on where you live witch one you can use:but you can type in your search engine:zero gravity chairs too and gets hundreds of pages like these.
http://www.zero…

http://www.amaz…

http://www.badb…

Happy hunting:Sky.
And forgot:two of my friends have one:are very pleased with them.

I have an outdoor styled one and it is very comfortable. I don't use it to relieve pain or nearly enough, so I cannot say it will help with your back. It is a comfortable position though.