In Exercise Ball: Calling all desk-job MFP'ers! Help me lose while I work

Help! I'm literally stuck at my desk for 8 hours a day, attached via my headset to take calls. I can't stand while I take calls because I have to use the computer. I walk on my breaks, and thankfully I'm a long way from the bathroom. I'm working my way up to taking 3 flights of stairs. Posts by members, moderators and admins should not be considered medical advice and no guarantee is made against ...Exercise Ball