This semester I'm working in a computer lab. With my arthritic knees and hip I can't do a lot of standing or walking around, but it doesn't help to be seated all day either. Thanks to Spark I found ways to avoid stiffness and burn a few calories.
First I set up my online timer - timer.onlineclock.net/of f.html for 30 minutes. When it goes off I do one of these before re-setting it for another 30 minutes.
I also keep a travel cup or water bottle by me which I get up and walk about to refill (and drinking regularly, I also have to make trips to the restroom!) so by the time I finish my day I've drunk my 8 cups, and avoided the stiffness that used to settle in.
I really like your suggestions. I also have a sedentary job, My employer has provided a number of stand-up workstations, meaning I do have the option of raisng or lowering the height of my work surface. I keep a resistance band in my wheelie and will try to get at least one round of resistance workout done on a 15 minute break. the treks back and forth to the water cooler or restroom add some pep to my day, and som nights I will do sprints in the outer corrider-one of the perks of working nights- there is no one to bother - I come back sweating 1366 days ago