Neil Armstrong sat down for an interview during Apollo, and was asked about exercise, and he said something similar - “I believe we have a finite number of heartbeats, and I’ll be damned if I’m going to waste mine running around the block.” Well, apparently this didn’t go over very well at the public affairs office at NASA, and a week later he was forced to “clarify” his remarks, and explain how he really loved exercising and staying fit, etc. LOL
I thought that comment was from Mercury program astronaut Gordon Cooper.