Sitting down for an extended period can be a drag because it makes you tired and your bum gets numb. There should be a little of both each day (Walking around and taking a seat).
International Level: New Activist / Political Participation: 10 1%
I work at a desk a lot of the time but I do not sit down. I have a desk that allows you to stand up at it or sit down at it as it is adjustable to different heights. I like to stand and do my work rather than sit down. I do sit at times but it is usually less than four hours a week..