[fsavard]

I have a very similar experience with sit-stand setups. I have one at home and had one at work.

I stand up for routine tasks (email etc.) and sit down for deeper work. I find standing unconsciously restricts breathing (core muscles contract) so makes me exhausted more rapidly. I rarely work standing for more than an hour.

Reading comments here it seems a very common experience.

I think no matter how many studies on the subject there will be, personal experience dictates how we'll do it. Like you I'm just glad the option now is now socially acceptable to be a bit more mobile when doing desk work.