I made my own standing desk and I've been using it for a year now. I won't go back because just by doing that, I have more energy through the day. Who cares what the flip-flopping WSJ keeps saying.
You are better off setting a timer and, every 20-30 minutes or so, getting up and moving around (you don't have to exercise strenously; just walking for a couple minutes from one spot to another seems to do it).
Just 10-15 minutes? Where did they find subjects for a research study that didn't stand for at least 10-15 minute spans during the day?
[Citation needed]
This isn't meant as a threat, either: I'd be quite interested in a comprehensive literature review of this stuff.
It reminds me a bit of the brouhaha around barefoot running: some decent evidence suggests barefoot is "better," while some suggests that forefoot striking is really the key. Expert opinion is split.
Source: I don't run, but I read an article once.