Doing sit-ups can be very useful for strengthening and toning the abdominal muscles. Sit-ups work the mid-section and sides of the abdominal region . However, neither sit-ups or crunches will get rid of belly fat; reducing belly fat requires doing cardiovascular exercises and eating healthy foods, states Dr. Oz.
Abdominal exercises, such as sit-ups and crunches, work the muscle groups that are underneath any visceral fat. These muscles include the rectus abdominus, external and internal obliques, states the Bodybuilding website. However, belly fat must first be lost through cardio exercises, such as walking, running and aerobics. Sports such as basketball or bike-riding are also good cardio exercises. Approximately 30 to 40 minutes of cardio at least 6 days a week can help to eliminate belly fat and burn calories. It is a good idea to incorporate a weight training workout along with regular cardio exercises, states Dr. Oz.
Watching one's diet is also important in eliminating stomach fat. Foods that are high in saturated fats should be eliminated from the diet. Eating foods that are rich in monounsaturated fatty acids, such as nuts and olive oil, are good because they do not promote belly fat, relates Dr. Oz.
Once stomach fat is eliminated, doing crunches with dumbbells can help strengthen the internal and external obliques. Similarly, sit-up can work the rectus abdominus.