A woman who had chronic back problems, when she found I did a lot of computer work, told me that sitting all day is one of the surest ways to end up with back problems.
I do this once in awhile with a portable shelf I work off of. It’s good to make sure you move around or walk a bit so you don’t stand stationary too long and end up with varicose veins in your legs as the blood pools. Standing on something soft is also important.
Abraham