"The bottom line is that it is the only thing that's ever really been shown to prolong life... Ultimately, ageing is a product of a high metabolic rate, which in turn increases the number of free radicals we consume."
And you thought you wanted to rev up your metabolism! No, keep it slow. Make it slower! If you believe this stuff, that is.
ADDED: New research indicates that exercise does not "rev up" your metabolism (as many people seem to think). It either stays the same or slows down. I'm guessing that response is healthy and protective of the body, not a dysfunction at all (as many people seem to think).