A woman who has had a C-section can start flattening her stomach with a healthy diet and gentle exercise once they have been approved by her doctor, says Pregnancy-Info.com. Most women can begin light cardio and stomach-toning exercise about six to eight weeks after having a cesarean section.
Eating a nutritious, low-fat diet after having a C-section gradually reduces stomach fat. Isometric exercises that squeeze in the stomach muscles can strengthen and firm the belly, but they do not remove fat, according to BabyCenter. Because post-C-section women must protect their scars from tearing open, low-impact cardio exercises, such as walking, swimming and biking, are recommended to burn calories and reduce fat.