Run - I used to love running 1/2 marathons, 5Ks and etc, but my knees are shot (I need them both replaced, but not doing that until my DD goes away to college).
Others mentioned doing a cartwheel - yeah...I canāt do that either.
Memorize song lyrics - I used to be able to listen to a song a few times and remember the words and now Iām lucky if I remember the name of the song - LOL!