Muscle repair is included in a tummy tuck whenever it is needed. When the abdomen rapidly expands, the abdominal muscles can stretch and separate, a condition called diastasis recti. During a tummy tuck, these separated muscles are pulled together again and stitched in place. This muscle repair creates a sort of internal girdle that will hold the core strong and create the appearance of a flatter, tighter tummy after surgery. Also, because the core is aligned and tightened, many patients feel stronger and feel relief from back pain