You went to your six-week postpartum checkup. The doctor pressed on your belly, said something about a finger gap, and sent you on your way. Maybe they mentioned diastasis recti. Maybe they didn’t. Either way, you’re now home with a lower belly that won’t engage, a back that aches, and a feeling that something’s not quite right.
Welcome to the most under-explained chapter of postpartum recovery.
Let me clear it up.
What diastasis recti actually is
Your rectus abdominis — the “six-pack” muscle — is two long strips of muscle running down the front of your abdomen. They’re connected by a strip of connective tissue called the linea alba. During pregnancy, that connective tissue stretches to make room for the baby. After birth, it usually starts to come back together. Sometimes it doesn’t.
When the gap between the two muscle strips remains wider than two finger-widths after 8–12 weeks postpartum, it’s clinically called diastasis recti. About 60% of women have it at six weeks. About 30% still have it at one year if it isn’t addressed.
Here’s the part nobody explains clearly: it’s not just the gap. It’s the integrity of the connective tissue itself. Two women can have the same gap width and one can be functionally fine while the other has core dysfunction, lower back pain, and a doming belly during exertion. The difference is the tension and quality of that linea alba.
Why the usual advice fails
If you’ve Googled diastasis, you’ve seen two camps online:
- Camp 1: Avoid all core work forever. Don’t twist. Don’t lift. Don’t breathe wrong.
- Camp 2: Do these magic five exercises and your gap will close in 30 days.
Both are wrong.
The first camp creates fear and weakness, which guarantees the dysfunction stays. The second camp ignores that diastasis isn’t about the gap closing — it’s about the tissue regaining tension. You can have a “closed gap” with terrible function, and you can have a “wider gap” with great function.
The exercises that “close the gap” on Instagram are usually doing something more boring but more important: they’re rebuilding the deep core (transverse abdominis), the pelvic floor, and the breathing pattern. The gap narrowing is a byproduct, not the goal.
Don’t chase a closed gap. Chase a functional core. The gap takes care of itself.
What works and why
Real recovery for diastasis runs on three principles:
Manage intra-abdominal pressure. Every time you lift, breathe wrong, or strain, you push outward on that healing linea alba. If your pressure system is dysfunctional, you’re stretching the tissue instead of letting it heal. Most diastasis “doesn’t close” because the tissue is being re-stressed daily by ordinary movement done wrong.
Train the deep core, not the surface. The transverse abdominis (TA) is the deep girdle muscle. When it activates correctly with the pelvic floor and diaphragm, it generates inward tension that pulls the linea alba taut. That’s what restores integrity. Crunches do the opposite — they push outward.
Progress slowly and watch for doming. If you do an exercise and your belly domes outward like a ridge, stop. That’s the signal that the load exceeds what your tissue can hold. Lighter, longer, with breath. Always.
How to actually do it
This is roughly an 8–12 week protocol, but you progress based on response, not weeks.
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Phase 1 (weeks 1–4): Reconnection. Diaphragmatic breathing. Pelvic tilts. Heel slides on your back with TA cue (“draw belly button gently toward spine on the exhale”). 10 minutes a day. No crunches. No planks. No heavy lifting.
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Phase 2 (weeks 5–8): Activation. Add bird-dogs, dead bugs, glute bridges with breath coordination. Look for a flat or lifted belly response on the exhale, not doming. If you dome, regress.
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Phase 3 (weeks 9–12): Integration. Modified planks (knees), side planks, controlled lifting, gentle squats. Still cueing the breath. Still watching for doming.
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Test your progress monthly. Lie on your back, knees bent, fingers across your midline above and below the belly button. Lift your head slightly. Feel the gap and the tension. If the gap is narrower OR the tension is stronger, you’re winning. Both can improve independently.
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Get a pelvic floor PT if you can. Two or three sessions with a specialist will save you months of guessing. They can assess things you can’t feel from the inside.
What to avoid
- Sit-ups, crunches, V-ups, leg lowers
- Full planks before phase 3
- Heavy compound lifts (deadlift, squat) without breath coordination
- Exercises that cause your belly to dome or bulge during effort
- “Waist trainers” and binders sold as a fix — they don’t fix anything and can mask poor function
The real win
Closing your diastasis isn’t about looking flatter. It’s about getting your core back as a functional unit. When the deep core works, your back stops aching, your posture improves, you can lift your kid without bracing wrong, and exercise becomes safe again.
The visible results follow. They always do, eventually. But they’re not the point. The point is reclaiming your body’s structural integrity so the rest of your life — picking up your baby, going back to running, sleeping without back pain — actually works.
Show up to the boring stuff. Breathe well. Trust the process.
— Laet