Liposuction and Abdominal Muscle Tightening??

Liposuction removes fat.  It can't tighten the fascia.

Tummy tucks tighten the muscles (actually tighten the fascia which holds the muscles), remove fat and remove extra skin.  There are many different types of tummy tucks, depending on what the patient needs.

Patients who have their fascia tightened are usually quite happy that when they do a situp, they no longer have the bulge between the muscles. 

While diet and exercise can reduce fat, there is no way to exercise away a weak fascia.  There is also no way to exercise away loose skin.  For patients with loose skin and loose fascia, a tummy tuck gives great relief.

The accumulation of fat, production of stretch marks and loosening of abdominal muscular tone, including umbilical hernias, are some of the changes, which women dislike after pregnancy.  The best body contouring procedure is dependent on what's "objectionable" as well as the patient's health status and aesthetic sense, as well as the surgeon's recommendations.  For example, some women will reject a tummy tuck because of their aversion of a long scar, preferring a more modest improvement by liposuction. Many women who consult me are "super Moms", who loose their "baby fat" rapidly after they deliver.  This subset get frustrated because despite exercising diligently, they are unable to restore the integrity of their abdominal wall.  This is where some variant of a limited incision tummy tuck may be beneficial, assuming that they do not have excessive skin.  In order to choose the optimal combination of techniques for your individual needs, consult with some board certified PS.  They will undoubtedly give you the rationale for a circumferential approach to the trunk (abdomen and hips), as well as caution you on whether you may be at risk for liposuction contour irregularities.  Good luck.