Ultimately, the only power to which man should aspire is that which he exercises over himself.
I consider conversations with people to be mind exercises, but I don't want to pull a muscle, so I stretch a lot. That's why I'm constantly either rolling my eyes or yawning.
I believe that every human has a finite number of heart-beats. I don't intend to waste any of mine running around doing exercises.
The sovereign invigorator of the body is exercise, and of all the exercises walking is the best.