Methods of detecting rectus abdominis separation include self-testing and performing imaging tests. Separation of the rectus abdominis muscle from the midline to the sides of the abdomen is called separation of the rectus abdominis muscle. 1. Self-detection: lie on your back, bend both legs, support your left hand behind your head, insert your right index and middle fingers vertically into your abdomen (above the navel), relax your body, then lift your back slightly, you can feel both sides of the abdominal muscles squeezing the fingers in the middle, if you can’t feel the squeezing, then insert your ring finger into your abdomen, and if it is bigger than two, then the rectus abdominis muscle will be separated. 2. Imaging methods: ultrasound or nuclear magnetic resonance imaging (NMR) can be used to determine the shape of the rectus abdominis muscle and the degree of separation of the rectus abdominis muscle. Separation of the rectus abdominis muscle is prone to low back pain, internal organ displacement, and even abdominal wall hernia, etc. It is recommended to consult a doctor for rehabilitation in time.