I pretty much got out of programming because sitting for too long resulted in me having serious spine problems culminating in surgery. Not sitting long enough means I rarely get into the ‚zone’. I’m glad others have figured it out better
For me a standing desk decreases "friction" to move around. I find myself bouncing from foot to foot, pacing back and forth, etc.
A chair OTOH makes it too easy to be motionless for longer period of time.
That being said, an electric standing desk makes it easy to swap between sitting / standing.
https://scitechdaily.com/new-research-reveals-that-standing-...
All this study proved is that you need to actually move, switching between standing and sitting is useful because it breaks the habit about staying in one static position for a long time. The bit about standing being harmful is especially contrived and basically says if you entirely switch from sitting to standing, but don't move from the standing position for many hours, and repeat this every day, that's harmful. Well no shit. You gotta alternate your position, and you have to balance sitting and standing with actual exercise too.
I have a HM Mira and it makes such a huge difference I'm actually a bit sceptical of the "sitting for too long is bad" thing - sitting in a average chair maybe.