Backaches

I find sitting a long time really uncomfortable. My upper and middle back really start bothering me. I work in an office at a desk job, other than walking around a bit (which I try to do when I can), any other suggestions?

Backaches

I have had a pillow under my butt since about 9 weeks. Elevate your feet as much as you can. Even just putting your feet on a low shelf helps, but if you can fully extend, even better. Every so often, when mine is really bad, I turn over my garbage pail and put my feet on that.