They’re not cures for anything, and standing is not exercise.
A longitudinal study of more than 38,000 people published in the journal Occupational and Environmental Medicine found that standing or walking for more than six hours a day at work was associated with a doubled or tripled risk of needing surgery for varicose veins. Varicose veins are also associated with increased risks of arterial disease and heart failure.
It’s possible, though, that standing at work — as with sitting too much at home — could be a marker for other unhealthy demographic factors or habits, including lower socioeconomic status. There’s a difference between those who must stand or walk for most of the workday and those who can sit at any time.
But particularly for those who don’t have the option to lower their desk, there is at least some evidence in that study and in others that standing for much of a workday is not healthful.