what is diastasis
DEFINITION. The word diastasis means separation. So a diastasis recti is a separation of the rectus abdominis or the outermost abdominal muscles. When the muscles separate, the connective tissue that joins them, stretches sideways. The more it stretches sideways the thinner and weaker it becomes.ith the tummy tuck, even in the situation where the diastasis is successfully stitched surgically, absolutley nothing has been done to change the strength, tone or function of the muscles forming the stomach and back.