While focusing on crunches will definitely strengthen your abs, it unfortunately won't dissolve the tire or muffin top around your waist. To get rid of ab flab, you've got to include gut-wrenching, calorie-burning cardio regularly in your routine. And not just any kind of cardio — you need interval training. Alternating between moderate and speedy bursts is the key. How do I know?
A recent study in the International Journal of Obesity revealed that "women who alternated cycling as fast as possible for 8 seconds with 12-second rest periods repeated for 20 minutes dropped 9.5 percent of their mushy middles, whereas those who cycled steadily for 40 minutes gained."
If you need some interval training ideas to beat the bulge read more