Incorrect. "Exercising" doesn't mean going to the gym. Simply breathing exercises your diaphragm, and you do that without conscious thought.
Also, Stephen Hawking is always moving, just not so much in relation to the Earth. In relation to the Universe, however, he is moving many thousands of miles per hour.
Also, Stephen Hawking is always moving, just not so much in relation to the Earth. In relation to the Universe, however, he is moving many thousands of miles per hour.
Edit: Holy crap, it's the amazing disappearing comment!