Then there's also isometric exercises. I remember reading an article years ago about exercising in a chair by squeezing and releasing your buttocks. It seemed pretty silly at the time, but if the goal is to release some kinetic energy unobtrusively, that would do it. Of course, the stress balls and such seem like more fun, but the exercises would be good for me. Hmmm....
Out comes the credit card. I'll try both.

