Yes, it is. First, a low fat diet is key. Try my book for a well-balanced eating plan of 1500 calories per day of good food. Secondly, cardio workouts, four or five times per week are important for fat burning. No, that's not true.
All exercise burns calories.
Plus, it helps tone muscles and keeps your metabolism elevated. But you have to do the ab exercises correctly. One of my favorite tapes is called the Hit the Spot Abs Workout . Thirty or forty minutes per session is the perfect amount of time to burn fat and tone muscle. Finish it off with some good stretching for flexibility.