You're so vain. You probably think this column is about you.
Carly Simon may be down on vanity, but I'm cool with it, so long as you don't go off the deep end. (I'm talking to you, Heidi Montag.) The desire to look good can be a powerful motivator for achieving health and fitness.
"People are hard-wired to strive to look better because it brings benefits throughout life, be it in mate selection, employment opportunities, salary or life in general," I was told by Gordon Patzer, a professor of business administration at Roosevelt University in Chicago and the author of six books on the physical attractiveness phenomenon.
Patzer explained that there is actually...