I know two people who have done so. It “works” in the sense that you can indeed walk at about 1.5 MPH (a slow walk) while working. However, that’s only useful i

I know two people who have done so. It “works” in the sense that you can indeed walk at about 1.5 MPH (a slow walk) while working. However, that’s only useful if you’re trying to lose weight and can’t do so another way. Such slow movement has no cardiovascular benefit, so it’s pointless if you’re not trying to lose weight. Just use a sit/stand desk (and ideally, take breaks for exercise).