Work out at Work (Desk job)

I_Bake_Cakes23

I have a desk job and would like to do something at work to get in shape without looking like a complete fool. I can't sit on a ball because my desk is too high... any other suggestions?

I don't want to look too crazy because I am visible to fellow employees and clients.

new_me_9_67

Walking is always good. during your brakes you could walk around the building and maybe even get some of your coworkers involved.
static muscle contractions work too.