Diastasis Recti
Separation of the abdominal muscles along the midline
Quick Facts
- Type: Abdominal wall condition
- Common in: Pregnancy and after childbirth
- Key sign: Bulge or ridge down the middle of the belly
- Main treatment: Targeted exercise and physical therapy
Overview
Diastasis recti is a widening or separation of the two bands of the large abdominal muscle (the rectus abdominis) that run down the front of the belly. These muscles are normally joined by a band of connective tissue along the midline, and when that tissue stretches and thins, the muscles move apart.
It is very common during and after pregnancy because the growing uterus stretches the abdominal wall, but it can also affect newborns, men, and others. Diastasis recti often causes a noticeable bulge or ridge down the middle of the abdomen, especially when sitting up. It is usually not dangerous and frequently improves over time, particularly with the right exercises.
It is helpful to know that some degree of separation is normal in late pregnancy and that the gap often narrows on its own in the months after birth. Focusing on safe, gradual core recovery rather than rushing into intense abdominal exercises gives the connective tissue the best chance to recover.
Symptoms
- A bulge, ridge, or doming down the middle of the belly, often more visible when sitting up or straining
- A soft gap you can feel between the muscles above or below the navel
- A feeling of weakness in the core or trunk
- Lower back pain
- Poor posture or trouble with lifting and certain movements
- Bloating or a sense of pressure in the abdomen
Diastasis recti itself is usually painless. A bulge that becomes painful, firm, or does not flatten when lying down should be checked, as it could indicate a hernia.
Causes
Diastasis recti happens when the connective tissue between the abdominal muscles is stretched and weakened.
- Pregnancy: The most common cause, as the growing uterus and hormonal changes stretch the abdominal wall.
- Repeated abdominal pressure: Heavy lifting with poor technique or improper core exercises can contribute.
- Newborns: The abdominal muscles may not be fully joined at birth and usually come together as the baby grows.
- Other strain: Significant weight changes or conditions that raise abdominal pressure.
Risk Factors
- Pregnancy, especially multiple pregnancies or carrying twins
- Older age at pregnancy
- Delivering a large baby
- Repeated heavy lifting or straining
- Significant weight gain
Diagnosis
Diastasis recti is usually diagnosed by examination:
- Physical exam: A clinician feels for the gap between the muscles, often while you lift your head and shoulders from a lying position, and measures its width.
- Imaging: Ultrasound or other imaging is occasionally used to assess the separation or to rule out a hernia.
Treatment
Most cases improve with conservative care, and exercise is the cornerstone of treatment.
- Targeted exercises: Gentle core-strengthening exercises that engage the deep abdominal muscles, ideally guided by a physical therapist.
- Avoiding harmful movements: Steering clear of traditional sit-ups, crunches, and heavy straining early on, which can worsen the gap.
- Good technique: Learning to support the core when lifting, coughing, or getting up.
- Surgery: Considered for large, persistent separations that cause symptoms or are linked to a hernia, after other measures have been tried.
After pregnancy, the gap often narrows over the following months, and a guided exercise program can support recovery.
Progress is usually gradual, and consistency matters more than intensity. A physical therapist can check your technique, confirm you are engaging the right muscles, and advance your program safely as the gap narrows and your core strength improves.
Prevention
- Strengthen your core safely before and during pregnancy under guidance
- Use good technique when lifting and getting out of bed
- Avoid straining and exercises that cause the belly to dome
- Maintain a healthy weight
- Begin postpartum core rehabilitation gradually with professional advice
When to See a Doctor
See a doctor or physical therapist if you notice a midline bulge or feel a gap in your abdominal muscles, especially after pregnancy, so you can get a safe exercise plan. Seek prompt care if you have:
- A bulge that becomes painful, firm, or does not flatten when lying down
- Pain, nausea, or vomiting with the bulge, which could signal a hernia complication
- Worsening back or pelvic pain that limits daily life
Frequently Asked Questions
What is diastasis recti?
It is a separation of the two bands of the main abdominal muscle along the midline of the belly. The connective tissue between them stretches and thins, often during pregnancy, causing a visible bulge or ridge.
Will diastasis recti heal on its own?
After pregnancy, the gap often narrows over several months. Targeted core exercises and good technique support recovery, while sit-ups and heavy straining can slow it. Larger separations may need physical therapy or, rarely, surgery.
What exercises are safe for diastasis recti?
Gentle exercises that engage the deep core muscles, ideally guided by a physical therapist, are best. Traditional sit-ups, crunches, and movements that make the belly dome should be avoided until the gap improves.
How is diastasis recti different from a hernia?
Diastasis recti is a stretching and separation of the muscles, while a hernia is tissue pushing through a true gap or weak spot. A bulge that is painful, firm, or does not flatten when lying down may be a hernia and should be checked.
Can men get diastasis recti?
Yes. Although it is most common in pregnancy, men can develop it from repeated heavy lifting, straining, or significant weight changes that stretch the abdominal wall.
References
- Mayo Clinic. Postpartum care.
- MedlinePlus, U.S. National Library of Medicine. Abdominal wall.
- American College of Obstetricians and Gynecologists (ACOG). Exercise after pregnancy.
- National Health Service (NHS). Stomach exercises after having a baby.