From Shape magazine.
"To flatten your tummy give those crunches a break and cut a rug instead! A recent study from Oregon State University found that dancers have less belly flab than non dancers-even when their weight and total amount of body fat are the same. High-intensity activities (running and biking count too) trigger the release of cortisol -a hormone that helps burn calories. And there are more cortisol receptors in your ab area than any other part of your body. Now the only question is which move to bust out first: the worm, the salsa or the running man?"