I had a standing desk at home for a month and ultimately gave it up (I worked from home that entire month, so it was used full time). Despite my efforts, I just found I could not concentrate as well and gave up.
What about sitting on exercise balls?[0] Where do they fall in the spectrum? At my new job they are all the rage and so I am trying one out. They do seem to be a decent middle ground between standing and sitting in a chair.
I used a ball for almost a year, and my opinion is that it's no better than a chair overall, and in some ways worse. Items 1, 2, 4, 5, and 7 in the list linked above are completely untrue in my experience. Not only is it every bit as possible to sit with poor posture on a ball as it is in a chair, but the ball actually encourages poor posture in some circumstances. I found that as the day progressed and I grew tired, I settled into a low-energy perch with my feet wide, my butt hanging more rearward on the ball, and my back rounded. This is a very stable position on a ball -- no core correction needed. It's pretty much the worst posture possible, and it was extremely difficult to mindfully avoid it.
When I get tired in a chair, I lean against the back, and if it's a good chair I won't be stressin out my discs.
What about sitting on exercise balls?[0] Where do they fall in the spectrum? At my new job they are all the rage and so I am trying one out. They do seem to be a decent middle ground between standing and sitting in a chair.
[0] http://www.gearfire.net/10-reasons-to-use-an-exercise-ball-a...