I've been using standing desk for over a year at work, and the first month went similar to the way the OP described. Unlike the OP though, it was never my inten

I've been using standing desk for over a year at work, and the first month went similar to the way the OP described. Unlike the OP though, it was never my intention to stand all day. I stand when I feel like, and sit (on a tall chair) when feel like it (right now it is probably 70/30). I have a bar running across the bottom of the desk 1 foot off the ground. I can put my foot on it, so I can bend my legs and move around quite a bit. Trying to just stand stationary all day, which appears to be what the OP was trying to, sounds very uncomfortable and counter productive. The whole point (at least for me) isn't to not-sit-all-day, but to able to move legs through the day.