I am really thin, but my stomach is really flabby. what exercises can i do to get a flat stomach?

Exercises: A well balanced diet and exercise program that combines strengthening and cardio is best. That being said core strengthing exercises are designed to strength the midsection.

Exercises: For a flat abdomen eat healthfully ; be physically active. Calories burned must > calories consumed. To tighten ab's do crunches, reverse crunches, exercise ball crunches, pelvic thrusts, lying leg raises, side bridge ; “bicycling” exercise on your back. Engage in regular aerobic exercise (i.e., running, swimming, nordic track, bicycling, kickboxing, walking, cross country skiing, hiking, etc.).