Can You Run With Diastasis Recti? Here's What Your Core Actually Needs First

Can I Run With Diastasis Recti?

Getting back to running is usually top of the postpartum wish list. Right up there with sleeping through the night and finding matching socks. But before you lace up, your core needs one thing first: your front and back need to start talking to each other again.

If you've got diastasis recti (DR), that conversation has gone quiet. Here's what's happening, why running makes it obvious, and exactly what to do about it, with the research to back it up.

What is diastasis recti, really?

Diastasis recti is when your six-pack muscles (your rectus abdominis) separate along the midline of your belly. It can happen to anyone, but pregnancy makes it almost universal: your belly stretches, your connective tissue gives, and up to 88% of women show some separation in the weeks after birth, according to a 2024 ultrasound study of 157 postpartum women.

Here's the analogy I like better than "your abs are torn apart," because that's not what's happening and it's not helpful to hear: think of your front core and back core as two best friends who used to finish each other's sentences. Before baby, they moved together automatically, no communication breakdown, no second-guessing. Pregnancy stretched the line between them, and now the signal's spotty. They're both still there. They just stopped coordinating.

That miscommunication is what causes the "mom pooch," the low back ache, and the feeling that your core just isn't there for you anymore. The muscles aren't broken, they're disconnected.

Why Running is Where this Shows up First:

Here's the part most postpartum advice skips: running isn't just cardio. It's a single-leg, whole-body coordination pattern, and it demands more from your core than almost anything else you'll do that day.

Every stride, you're balancing on one leg while your opposite arm swings forward. To keep that from turning into a wobbly mess, your body sends force on a diagonal from your right shoulder down through your core to your left hip, and back again on the other side. Physical therapists call this the front and back "sling" systems, but you can just think of it as your body's diagonal power line. It's how force actually gets from your upper body to your lower body and back, stride after stride.

When your core is well-connected, that diagonal line fires without you thinking about it. When it's not - which is exactly what's happening with DR - your body finds workarounds. Usually that means your low back, hips, or pelvic floor start picking up slack they were never meant to carry. That's why running often makes DR symptoms (or back pain, or leaking) show up when nothing else does.

So: can you run with diastasis recti? Eventually, yes. But not until that diagonal line is reconnected and your core can actually hold up its end of the deal.

A personal note here: after three C-sections, I never had diastasis recti. That's genuinely unusual, and I know how lucky it is. But it caught up with me anyway: at 9 months postpartum, before we'd built out our return-to-running program, I ramped up my mileage and my speed way too fast. That's when the DR showed up - not from the pregnancies or the surgeries, but from asking my core to handle dynamic, fast running before it was actually reconnected. If it can happen to someone who came through three C-sections DR-free, it can happen to anyone who skips this step. That's exactly why this program exists.

Reconnect Before You Run: 3 Things to do First

We generally don't recommend running before 12 weeks postpartum no matter what, DR or not - your abdominals and pelvic floor need that runway to recover. If you've got DR, here's what to prioritize in the meantime.

1. Check that your pelvic floor can actually relax. This one surprises people: healing DR starts with your pelvic floor relaxing, not tightening. Try this simple check: lean forward slightly, place your fingers just inside your sit bones, and take a deep breath in. Can you feel that tissue soften underneath your fingers as you inhale? If your pelvic floor is gripped and tense all the time, your abdominal wall can't do its job either. They're part of the same team. Breathe all the way down - belly, ribs, pelvic floor - before you ask your core to do anything else.

2. Massage the connective tissue. Grab some lotion and gently massage along the sides of your obliques: the connective tissue here can get sticky and restricted after pregnancy, and that restriction is part of what's muffling the signal between your front and back core. A few minutes, a few times a week, helps wake that tissue back up.

3. Reload the tissue the right way. Tissue doesn't heal by staying still. It heals by being loaded correctly, which means retraining the pattern from the ground up:

   • Inhale, and let your pelvic floor fully relax and drop

   • Exhale, and gently draw the two sides of your hip bones toward each other like you're doing up an invisible corset, or cinching your sports bra one notch tighter

   • Feel for that deep, quiet engagement (that's your transverse abdominis, your body's natural corset muscle) rather than a hard squeeze or a rib-flare

   This is the pattern your core forgot how to do automatically. You're not building new muscle here, you're reintroducing two old friends.

What the Research Actually Says:

This isn't just a "give it time" situation, structured rehab has real, measurable results:

• A 2026 meta-analysis pooling nine randomized controlled trials found that women who followed structured core exercise programs closed their inter-recti gap by an average of 8mm more than women who did nothing: a meaningful, measurable difference.

• A 2025 network meta-analysis compared different rehab approaches head-to-head and confirmed that active, targeted core exercise consistently outperforms passive approaches like abdominal binders alone.

• A 2024 scoping review in the International Urogynecology Journal looked across the current research and found that consistent, progressive core loading is the common thread in every approach that works.

• Separately, a 2024 study of postpartum women found a real connection between diastasis recti and pelvic floor function, reinforcing that these two systems really do need to be treated as one team, not two separate problems.

The takeaway: this isn't guesswork, and it isn't something you just have to live with. Consistent, correctly-loaded core work works.

Once You're Ready to Run: Fix Your Form First

When you do get the green light, form matters more than pace. Bad running form loads your core and pelvic floor exactly where they're weakest.

Have someone film you running from the side, and check for:

• Your foot landing under your body, not way out in front (a hard heel strike usually means you're over-striding)

• A slight forward lean from your ankles, not your waist

• A natural, relaxed rotation through your trunk, arms swinging at about 90 degrees

If you're over-striding or landing hard on your heel, try cadence training: aim for roughly 170 steps per minute using a metronome app or a playlist at that BPM. Research on step-rate manipulation has shown that even a 5% increase in cadence meaningfully reduces the impact load on your joints and core.

If you're not leaning forward enough, two easy fixes: stand a few feet from a wall, lean forward from your ankles to place your fingertips high on the wall, and run in place for 30 seconds, 3-5 rounds. Or set your treadmill incline to 3-4% for a few runs to teach your body the pattern.

Keep Tabs on Your Progress:

Check in on your DR every couple of weeks as you build back up:

• Lie on your back, fingers centered just above your belly button

• Lift your head slightly, until your shoulder blades come off the ground

• With your abs engaged, feel above and below your belly button: how many finger-widths is the gap, how deep does it go, and where is it - up near your ribs, at your belly button, or down low?

If that gap is getting wider instead of narrower, or your back or pelvic pain is getting worse, that's your sign to pull back on running and get a personalized plan from a pelvic floor PT rather than pushing through.

If your abdominal separation increases, you might want to take a break from running to focus on strength (Psst: Our Postpartum Fitness Guide might do the trick).

The bottom line:

Yes, you can run again with diastasis recti - most moms can. But your core needs to be back on speaking terms first. Reconnect the breath, wake up the tissue, retrain the pattern, then rebuild the mileage. Slow and steady isn't just a nice phrase here, it's the actual fastest way back.

Not sure if you're ready to run?

You don't have to figure it out by trial and error.

Inside the Expecting and Empowered app, we created a Return to Running Program specifically for postpartum moms. It starts with an in-depth running assessment that looks at far more than just your endurance. You'll be guided through a series of tests that assess your core strength, pelvic floor function, balance, stability, single-leg strength, impact tolerance, and movement patterns, including the areas most commonly affected by diastasis recti.

Based on your results, you'll receive personalized exercise recommendations to help rebuild the strength, coordination, and control your body needs before running. Whether you're working on reconnecting your deep core, improving single-leg stability, or building impact tolerance, you'll know exactly what to focus on instead of guessing.

Then, when you're ready, our progressive Return to Running Program walks you through structured, guided runs that gradually rebuild your mileage and confidence so you can return to running safely and come back stronger than ever.

References:

1. Li M, Wang N, Wang R, Liang B. Ultrasonographic evaluation of diastasis recti abdominis and its association with pelvic floor dysfunction in postpartum women. Front Med. 2024.

2. Non-operative management of postpartum diastasis recti: a systematic review and meta-analysis of RCTs. Hernia. 2026.

3. An evidence-based comparison of rehabilitation strategies for diastasis recti abdominis in postpartum women: a systematic review and network meta-analysis. Sci Rep. 2025.

4. Skoura A, Billis E, Papanikolaou DT, et al. Diastasis recti abdominis rehabilitation in the postpartum period: a scoping review of current clinical practice. Int Urogynecol J. 2024;35(3):491-520.

5. Heiderscheit B, Chumanov E, Michalski M, et al. Effects of step rate manipulation on joint mechanics during running. Med Sci Sports Exerc. 2011;43(2):296-302.

6. Sperstad JB, Tennfjord MK, Hilde G, Ellström-Engh M, Bø K. Diastasis recti abdominis during pregnancy and 12 months after childbirth. Br J Sports Med. 2016;50(17):1092-1096.

7. Deering RE, Chumanov ES, Stiffler-Joachim MR, Heiderscheit BC. Exercise program reduces inter-recti distance in female runners up to 2 years postpartum. J Womens Health Phys Ther. 2020;44(1):9-18.