Gaiam Balance Yoga Ball Chair
Haven't had a backache for over a year now! Very easy and comfortable..plus a hoot to watch the less-than-graceful co-worker attempt to sit in it...I don't understand why some people have trouble with it...very easy and natural. You can take the ball off to do some stretching and yoga moves. Comes with pump and exercise book. Sells for $20 less on Amazon than direct from Gaiam (sorry Gaiam...you're still my peeps)
I received this chair as a gift and absolutely love it. I feel so energized even after sitting for hours. I find myself sitting up straight which is great for my posture and I can feel my stomach muscles working a little -get for my figure! I am one of the young guns in the office so it freaks everyone out a little, but in a good way -great conversation starter!
I need this! Right now I have a stability ball at my desk at home, this one is better because it offers back support!