Diastasis recti (say “dy-AS-tuh-sus REK-ty”), or DR, is a condition that happens when there's a gap larger than 2 centimeters (cm) between the two long muscles at the front of the belly (abdomen). These muscles are called the rectus abdominus.
There is connective tissue, called the linea alba, between the rectus muscles to help them stay together. It's normal to have a gap between the muscles that's less than 2 cm wide. But with DR, the connective tissue in this space may become weak, or too relaxed to keep those muscles connected.