Some suggestions for you:
1. Punch out Morse code on a punching bag. A=punch kick, B=kick punch punch punch, etc.
2. Recite the periodic table of elements while walking around the end of a baseball bat. (points if you can walk in a straight line afterward!)
3. Name the 50 states while doing jumping jacks or running in place.
4. List the numbers of pi while bouncing a ball.
5. Recite Shakespeare, poetry, a story, or the Gettysburg address while walking or running around the block.
What else would you add to the list?