Mr. Obvious

The New York Times featured an article on mathematical models of losing weight and obesity.  Turns out, to lose weight, one needs to eat less and exercise.  However, this group is all sciency and has charts.

As part of the 97% of American women who want to lose 10 pounds, this sounds familiar.  Can we somehow use math to figure out why it is so hard to eat less and exercise more?  A comprehensive, easy to follow plan would be the break-through of break-throughs.  Until then, I'll just feel mildly disappointed each time I skip the gym to run errands.