Gabboim That is not necessarily true.
I have to stand up all day which has ruined my feet and I cannot stand any longer without serious pain if I do not periodically sit down and take some pressure off them for a while.
I do not usually get explicit permission for this but without doing it I’d lose the job.
My supervisor and boss who both sit down all day doing nothing, and my coworkers get to sit down and do not get the criticism that I get, for doing what I must, to keep my job (and I have no other job to go to).
So while I am sitting down anyway, I often use the computer.
Also usually at the end of the day we are still, at work and not supposed to leave yet but the work for the day is done, so no reason to just sit around staring at the walls.