I won't bore you with all the details that fascinate me, but I was just reading an article citing research that gives us this great little nugget:
if you find yourself at a desk for long periods of time (hello, corporate America)...just the act of standing up periodically can improve your overall health and might even help slim your waistline.
The suggested dose of "periodically" was every half-hour. It doesn't say you have to stand up and walk two flights of stairs. Just stand up.
Myself, I would add a little stretch. Ward off carpal tunnel syndrome, you know. Stand up and gently shake out your fingers and wrists. Or extend your arm and gently pull your fingers back toward your body. Do this on each hand just to keep balanced. Either way, count to 10-Mississippi while you do it. Then get back to work.
Repeat every 30 minutes and let me know how you feel at the end of the week.