You notice a strange bulge in the middle of your abdomen when you sit up from bed. A soft gap between your abdominal muscles that wasn't there before. Diastasis recti after birth affects up to 60% of women, but for most it resolves on its own.
Here you'll find out what diastasis recti is, how to check yourself at home, exercises that help, and when to see a physical therapist. All based on current evidence and guidelines.
What Is Diastasis Recti?
Diastasis recti (rectus diastasis) is a separation of the two rectus abdominis muscles along the midline of the abdomen. The connective tissue between the muscles — called the linea alba — stretches and thins.
This is completely natural during pregnancy. All pregnant women develop some degree of diastasis by around 35–39 weeks to make room for the baby. The problem arises when the muscles don't come back together after birth.
Diastasis recti is defined as:
- More than 2.5–3 cm (about 1 inch) of separation between the abdominal muscles
- Visible bulging along the midline with exertion
- A "tent" or "pyramid" shape on the belly during a partial sit-up
Reassuring numbers: In approximately 70% of women, the abdominal muscles come back together on their own within the first year, according to current research. There is no need to panic.
How Common Is Diastasis Recti?
Diastasis recti is far more common than most people realize:
- 60% have separated abdominal muscles 12 weeks after birth
- 30–40% have persistent diastasis recti one year after birth
- 70% normalize spontaneously with time and moderate activity
Risk factors include multiple pregnancies, large babies, twin pregnancy, and weak core muscles before pregnancy. But it can happen to anyone.
How to Check If You Have Diastasis Recti
You can do a simple self-test at home. Be aware though: studies show that self-testing has up to 70% inaccuracy. Ultrasound by a physical therapist is the gold standard.
Self-Test Step by Step
- Lie on your back with bent knees and feet flat on the floor
- Place two fingers horizontally, about an inch above your navel, on the midline
- Lift your head and shoulders gently (a partial sit-up)
- Feel for the gap between the muscles
- Repeat just below the navel and about an inch below the navel
Result:
- 1–2 finger widths: Normal, no diastasis
- 2–3 finger widths (2.5–3 cm): Mild diastasis
- Over 3 finger widths: Moderate to severe — contact a physical therapist
Timing: Wait at least 6–8 weeks after birth before doing the self-test. The muscles need time to begin coming back together.
Can You Exercise Your Way Out of Diastasis Recti?
Yes, for most people. Conservative treatment with exercise is the first-line approach and is recommended for at least 6 months before surgery is considered.
Recent research has nuanced the picture. Studies show that traditional sit-ups neither significantly worsen nor improve diastasis. However, most physical therapists still recommend specific core muscle training.
Exercises That Help
1. Pelvic Floor Exercises (start from day 1)
The pelvic floor and deep abdominal muscles work together. Studies show that women who start pelvic floor exercises 6–18 hours after birth have better healing outcomes.
- Squeeze the pelvic floor, hold for 5–10 seconds
- Release slowly and with control
- 10 repetitions, 3 times daily
2. Diaphragmatic Breathing with Core Activation
- Lie on your back with bent knees
- Breathe in deeply through your nose, letting your belly expand
- Breathe out through your mouth while gently drawing your navel toward your spine
- Hold for 5 seconds, repeat 10 times
3. Heel Slides
- Lie on your back with bent knees
- Activate your pelvic floor and deep abdominal muscles
- Slowly slide one leg out along the floor
- Bring it back with control
- Alternate sides, 10 repetitions per side
4. Quadruped Core Activation
- Get on all fours with a flat back
- Breathe out and gently draw your navel in
- Hold for 5–10 seconds without rounding your back
- 10 repetitions
Exercises to Avoid
In the first months after birth, be careful with exercises that greatly increase intra-abdominal pressure:
- Traditional sit-ups and crunches — avoid until diastasis has reduced
- Full plank — early planking can increase pressure
- Heavy lifting — build up gradually
- Rotational exercises — Russian twists etc.
Listen to your body. If you see your belly bulging into a "pyramid" during an exercise, the load is too great. Return to easier variations.
When Should You See a Physical Therapist?
Contact a physical therapist if:
- Diastasis is over 3 finger widths at 8 weeks postpartum
- You have pain in your back, pelvis, or abdomen
- You experience urinary leakage or a feeling of heaviness
- Your belly visibly bulges during activity after 3–4 months
- You're unsure whether you're exercising correctly
A physical therapist with expertise in women's health can perform ultrasound, give you tailored exercises, and track your progress.
Know your options: Many health insurance plans cover physical therapy sessions. Ask for a referral from your doctor for a physical therapist with expertise in women's health and postpartum recovery.
How Long Does Healing Take?
Healing time varies, but here is a rough estimate:
- 6–8 weeks: Most notice improvement, muscles begin to come together
- 3–6 months: Clear progress with regular exercise
- 12 months: Over half have normal muscle separation
- After 12 months: The remaining 30% may need active treatment or further assessment
When Is Surgery Considered?
Surgery (abdominoplasty) is never the first choice. Physical therapy for at least 6–12 months is tried first. Surgery is considered only for significant diastasis that doesn't respond to conservative treatment after an extended period. Discuss options with your doctor or OB-GYN.
Is Diastasis Recti Dangerous?
No, diastasis recti is not dangerous in itself and is not an injury. For many it is a completely natural part of the body's changes after pregnancy, with no pain or functional problems.
Focus on function, not appearance. Can you lift your baby without pain? Can you manage daily tasks? Then your body is on the right track.
Diastasis Recti After a C-Section
Diastasis recti occurs just as frequently after a C-section as after a vaginal birth. The separation happens during the pregnancy, not during the birth itself.
After a C-section you should wait even longer (12 weeks) before doing direct abdominal work, because the surgical wound needs time to heal. Start pelvic floor exercises early, and build up abdominal exercises gradually.
Frequently Asked Questions
Can men develop diastasis recti?
Yes. Men with central obesity can develop diastasis recti. Exercise and weight loss are the first-line approaches.
Can diastasis recti be prevented?
Strength training of the abdominal and pelvic floor muscles before and during pregnancy may reduce the risk, according to current evidence. Talk to your healthcare provider about appropriate exercise during pregnancy.
How do I know if my exercise is making things worse?
If you see the classic "tent" or "pyramid" shape appearing on your belly during an exercise, back off to an easier variation. Work with a physical therapist to find the right level of challenge for your current healing stage.
Summary
Diastasis recti is common, natural, and usually temporary. Around 70% normalize without treatment. Start with pelvic floor exercises early, add gentle abdominal exercises from 6–8 weeks, and give your body time.
The pelvic floor and abdominal muscles work closely together — strengthen one and you strengthen both.
Read More
Sources
- American College of Obstetricians and Gynecologists — acog.org
- Journal of Orthopaedic & Sports Physical Therapy — jospt.org
- American Physical Therapy Association — apta.org
- Goom T, Donnelly G, Brockwell E. "Returning to running postnatal." BJSM, 2019.