1.Start exercising: Getting a flat stomach involves losing belly fat. To achieve this, start a workout routine. If possible, exercise for at least 30 minutes a day. If this isn't possible, strive to exercise for at least 90 minutes a week - running, power walking, swimming or biking.
2. Strengthen the core muscles: In conjunction with losing belly fat, choose workouts that exercise the core muscles. Effective workouts include dancing, pilates, crunches, and knee and leg lifts. For the best result, keep your abdominal muscles tight during core workouts.