
The designer, Peter Opsvik from Norway, has done lots of thinking about sitting for more than 30 years already. On his website, he tells about his views and thoughts on sitting, and why moving and variation are important.
So, I browsed the internet a bit, and last week, I found a Stokke Thatsit (or Oposit, I'm not sure, it has the Oposit frame, but the Thatsit backrest) on Ebay. It's a bit like the Variable, in that it has the wobbly, rocking chair bit, but it also has a cross-shaped backrest so that you can lean back or put your arms somewhere.

Sitting in this chair is great fun; I move all the time: rocking, leaning back every once in a while, tilting forward, and each position I end up in feels good, so I don't shift that often. Even though it has a backrest, I don't feel inclined to use it very much. To my surprise, I can even sit on it for longer periods of time, without slumping, feeling tired of sustaining myself, or getting a stiff lower back.
I totally fell for this chair; first thing I'm going to do on monday morning is ask my manager for a Thatsit in my office. If I have to sit behind a computer for eight hours a day anyway, I might as well enjoy it.
