1 to 2 cm. The separation of rectus abdominis refers to the slight separation of rectus abdominis, which can recover naturally in one to two centimeters without surgery. The separation of rectus abdominis is an injury characterized by the separation of rectus abdominis along the midline. Patients with severe rectus abdominis separation can take exercise therapy, such as abdominal breathing pattern training, abdominal muscle and pelvic floor muscle training, abdominal plastic surgery, rectus abdominis separation and repair and other operations.