I didn’t want to go by the normal or rather average (recommended) length to stand at your desk and work.
I sit too much in a chair that isn’t all that comfy and I set up my desk where I can stand more. The only gripe I have is that I need to know what is a good time for me to stand at my desk, far as minutes not hours.
I tend to get tired a bit faster and I am lazy in a sense. So, I need to be a bit realistic on what to do.
I don’t want to stand for hours on end, then wonder “why the hell am I so exhausted?” when it is so obvious. I also don’t want to stay for a few seconds or less amount of minutes because “I don’t feel like it/I can’t be bothered”.
I need a healthy balance or medium for this desk set up.
I shall show a picture in a bit.
Eventually I want to get one of these ergonomic kneeling chairs. I had one back in college, and it was awesome. No money at the moment, though, and no space to put it until we get rid of some of the junk in the house. ¯\_(ﭢ)_/¯
You should be fine. Just did a small experiment standing still on a wooden floor for about ten minutes, knees slightly bent. It’s more pleasant and less joint-straining than standing with knees straight. Occasional leg and core muscle exercises or stretches should help too.
Since you’re so used to sitting, it might be best to lean into it like a sprint or crawl sort of thing. You can try for twenty minutes, and if that felt okay, you can increase it to standing for twenty-five or thirty minutes. Then keep it there for a while until you feel ready enough to increase it again. Standing for an hour or two at most should be the only amount you should do as standing for much longer than two hours can be a pain.