After I worked with a certified trainer to make sure the exercises in Body by Starfleet were real and targeted the various parts of the (typical humanoid) body, I worked to make each one as fun and engaging as possible. Jumping jacks sound difficult and boring. Tholian Web Jumps, however, sound much more exciting! Few people want to do a Crunch, but what ensign wouldn't want to try a Wesley Cruncher? And even a Klingon couldn't resist doing a Tribble Twist!