A long-term study monitoring health impacts of 83,000 adults have definitely found that standing desks per se might not be all they're worked up to be.
The researchers indicate that investing in things like height-adjustable desks might be pointless ... Walk around the office a little, go up and down some nearby stairs, or even stand up and sit down ...
TL;DR: A major study involving 83,000 adults found that standing desks do not significantly improve heart health compared to ...