I recently had some back pain and bought a new chair that looks more like a pogo stick than a chair. It has just one main leg and intentionally wobbles easily with your movement to keep you moving. It works pretty well and one other factor is that it’s a little uncomfortable. This is actually a good thing because I’m trying to sit for only 10-15 minutes at a time and a sore butt is a very effective reminder to stand up.
If you want to keep moving, keep having new thoughts, keep being reminded of your comfort zone and your discomfort zone, then get an uncomfortable chair.