FitBALL® Seating Disc
Product Review (submitted on November 6, 2012):
I am not sure if it is psychological or truly that beneficial but I do not feel as lazy when I sit at my desk now. I love it. I think it works and it definitely helps my posture. I don't have a lot of back pain so that was not the issue, I actually wanted something to help keep me from slouching and to tone. I can't say it produces dramatic results, but I am sure it helps.