If you thought only crunches can give you wash-board abs, think again. Here are some fat-burning exer-cises that are even better.Losing fat on the belly is the hardest, they say. And when you want to strengthen your core and lose the flab, most probably what comes to mind are crunches and sit-ups. But recent research has found that exercises that are meant for the whole body can actually workout the core muscles better than the designated exercises for your abs.Strengthening your core muscles is important — because a fat belly can lead to many lifestyle diseases, while a flat one not only takes care of all that, but invariably, makes look you attractive too. These exercises are a different take on familiar ones. Each of these moves stimulates and tight-ens the core muscles while burning calories.Dumb-bellsTake an exercise mat and sit on it. Now stretch your feet out in front of you. Keep them around three feet apart. Take a pair of dumbbells in your hands and hold them near your shoulders. Keep your back straight. Contract your stomach muscles and push your arms straight up. Return to the starting position and repeat ten to 15 times.Cheers for the chairTake a chair and sit on it while keeping your spine straight. Hold the edge of the seat. Now engage your core and use the stomach muscles to bring your toes (pointing to the floor) two to four inches off the floor. Hold for at least three to five seconds then lower your feet down. Re-peat for a few minutes.Try this outLunge!This is a lunge with a slight variation. Begin by standing with your feet together. Lunge back with your right leg as you bend your knees at right angles. Now reach right hand to left foot. Then go back to standing position. Now, lunge the right leg back and do the exercise again. After ten repetitions, switch sides.