About two weeks ago, I started standing 100% of the time while working.

I'm at the computer maybe 9-10+ hours/day. So this has been essentially a complete change in my habits of physical movement/rest.

I do martial arts and some body work regularly, so I started out in what I considered to be good physical shape but it definitely has been ... challenging.

I think I'm getting closer to adjusted currently. When I began, there were times when my legs felt something like lead.