It is widely known that the aesthetic reasons for getting a tummy tuck are numerous. A smoother, tighter, abdomen is the main reason most women opt for a tummy tuck. But in many cases the medical advantages can far outweigh the cosmetic reasons.
Here are just a few:
Improved Posture
Easier Exercise
Repairing the Ab Muscles and Closing Separation (Diastasis Recti)
Hernia Repair
Easing Urinary Incontinence Symptoms
For more information, see this article.