Ab separation (diastasis recti): rebuilding your core

What is diastasis recti, really?

Your rectus abdominis muscles run in two vertical strips down the front of your abdomen. A band of connective tissue called the linea alba connects them in the middle. Diastasis recti is simply the separation of those two muscles along that midline. It's not a tear. It's not damage the way an injury is. It's a stretching and thinning of connective tissue. For many people, it doesn't spring back to its pre-pregnancy tension right after birth.

You might notice it as a soft gap you can press your fingers into along your midline. Or a "coning" or ridge that appears down your belly when you sit up or strain. Or just a general sense that your core feels less connected than it used to. All of these are recognizable, common signs — not signs that something has gone unusually wrong.

Why does it happen?

Diastasis recti develops from increased pressure inside your abdomen. Pregnancy is one of the biggest sources of that pressure your body ever experiences. As your uterus grows, it pushes outward against your abdominal wall for months. This gradually stretches the linea alba to make room for your baby. This is a completely normal, expected part of how the body makes room for pregnancy. It is not a sign that you did anything wrong, lifted something you shouldn't have, or failed to "protect" your core.

The underlying cause is mechanical pressure, not a fluke or a fitness failure. That's why so many pregnant and postpartum bodies experience it. The question isn't whether your body should have prevented it. It's how to support it in reconnecting now.

What symptoms can it cause?

Beyond the visible or palpable gap, diastasis recti can contribute to real, physical symptoms worth naming rather than minimizing. It can play a role in leaking urine when you cough, sneeze, or laugh. It can also play a role in back pain, since your abdominal muscles work together with your back and pelvic floor to stabilize your spine. If either of these sounds familiar, it doesn't mean you're broken. It means your core support system needs some rebuilding, and that rebuilding is very achievable.

It's worth saying plainly: leaking urine or living with back pain after birth is not something you have to just accept as the new normal. Both are common, but common doesn't mean permanent or untreatable.

When should you call your provider?

Because diastasis recti varies so much from person to person, an in-person check matters more than trying to self-diagnose from an internet description. The Cleveland Clinic recommends contacting your healthcare provider for a proper diagnosis if the gap between your abdominal muscles is more than two finger-widths. Also contact your provider if you're experiencing any pain. A provider or pelvic floor physical therapist can measure the separation accurately and check its depth and tension, not just its width. They can also rule out anything else that might be contributing to your symptoms.

Reaching out isn't an overreaction. It isn't jumping the gun. It's the fastest way to get a clear picture and a plan that's actually built for your body.

How do you rebuild core strength safely?

The encouraging news is that diastasis recti responds well to the right kind of movement. Conservative management — especially physiotherapy — is generally recommended as the first step, rather than surgery or intensive ab workouts. A pelvic-floor or postpartum-trained physical therapist can teach you how to engage your deep core (particularly the transverse abdominis, the muscle that acts like a natural corset). You'll learn to coordinate it with your breath and pelvic floor before layering on more demanding movement.

This kind of rehab tends to start small. It begins with gentle breathing from your diaphragm and learning to brace without straining or holding your breath. Then it moves to functional movements, like safe ways to roll out of bed or stand up from a chair without your belly doming through the middle. From there, a physical therapist can move you toward more targeted strengthening. The pace matches how your specific separation is healing, rather than a one-size-fits-all timeline pulled from a fitness app.

What about how you feel about your body?

The physical side of diastasis recti is only part of the story. Many people also carry a quiet grief or frustration about a belly that looks and feels different than it did before. Then they feel guilty for caring about that, on top of everything else motherhood is asking of them. This is an incredibly common, human response. It deserves the same compassion you'd offer a friend.

The broader transition into motherhood often brings a sudden, total shift in focus toward the baby. That can leave new mothers unsure where to even bring up concerns about their own body. Sometimes it leaves them too ashamed to ask. If that resonates, know this. Closing the gap between noticing something and getting support for it is exactly the point of postpartum care. Your body, your pain, your leaks, and your feelings about your midsection are all legitimate things to bring to a provider. You don't need to earn permission to care for yourself. You don't need to wait until you're in crisis to ask for help.

Frequently asked questions

Sources

1. Diastasis recti is the separation of the rectus abdominis (six-pack) muscles, and it is a common condition affecting about 6 in 10 women after childbirth. — Cleveland Clinic
2. A person recovering from diastasis recti should contact their healthcare provider for a diagnosis if the gap between the abdominal muscles is more than two finger-widths, or if they are experiencing pain. — Cleveland Clinic
3. Diastasis recti develops from increased intra-abdominal pressure such as during pregnancy, and it can contribute to urinary stress incontinence and back pain; conservative management such as physiotherapy is generally recommended as the first-line treatment. — StatPearls (NCBI Bookshelf)
4. Matrescence, the developmental transition into motherhood, brings on a sudden shift in focus to the baby that can leave mothers feeling confused about where to seek help for themselves, and often too ashamed to ask; closing the gap between when a mother knows she needs mental health support and when she receives it is a key goal of maternal care. — Postpartum Support International (PSI)