How to Know If Your Core Is Actually Healed Postpartum
What diastasis recti, intra-abdominal pressure, and "coning" actually mean — and what to do about them.
At some point in the postpartum months, most moms start Googling when they can work out again. The answers they find range from "six weeks" to "whenever you feel ready" to increasingly alarming warnings about diastasis recti. The result is usually confusion — and either returning to exercise too soon or avoiding it so long that deconditioning becomes its own problem.
At MBODY Physical Therapy and Wellness in Westlake Village, we see a lot of postpartum women who've been told conflicting things about their core. Here's a clear, clinical framework for understanding what's actually going on — and how to know when your body is truly ready.
What Is Diastasis Recti?
Diastasis recti (DR) is a separation of the two sides of the rectus abdominis — the "six-pack" muscles — at the linea alba, the connective tissue running down the midline. During pregnancy, the uterus expands and the abdominal wall stretches; the linea alba widens to accommodate this. In most pregnancies, some degree of widening is normal and expected.
The question isn't just whether a gap exists — it's whether the linea alba has the tension and load transfer capacity to support function. A wider gap with good tissue tension can function better than a narrower gap with poor tension. This is why self-checking for diastasis at home (the "finger test") tells you incomplete information: gap width alone doesn't tell you whether your core is functioning.
What Is Intra-Abdominal Pressure — and Why Does It Matter?
Your core functions as a pressurized canister: diaphragm on top, pelvic floor on bottom, deep abdominals and back muscles wrapping around the sides. When you move, breathe, or exert yourself, pressure is generated inside this canister. A well-functioning core manages and distributes that pressure efficiently — keeping your spine stable and protecting your pelvic floor.
After birth, this pressure management system often needs to be relearned. If it isn't, high-demand movements create pressure spikes that push outward through the path of least resistance — which is often the linea alba (contributing to DR symptoms) or downward through the pelvic floor (contributing to leaking, prolapse symptoms, or heaviness).
This is why the question isn't "can I do a crunch?" It's "can I manage the pressure that movement generates?"
What Is Coning or Doming?
Coning or doming is a visible ridge or peak that appears at the midline of the abdomen during certain exercises — sit-ups, leg raises, getting up from lying down. It's the abdominal contents pushing outward through the linea alba because the tissue isn't tensioning properly under load.
If you see coning during an exercise, that exercise currently exceeds what your system can manage, and is inefficient. The fix isn't to stop moving entirely — it's to find movements that produce the same training stimulus without creating that pressure leak, and progressively build toward the harder movements. That movement often can be continued with proper guidance to support the canister.
Signs Your Core Needs More Attention
Visible coning or doming at the midline with sit-ups, leg raises, or getting up from the floor
Leaking urine with exercise, coughing, or sneezing
Pelvic heaviness or pressure during or after exercise
Persistent lower back pain that doesn't respond to rest
A feeling of instability or "giving way" in the core
Signs Your Core Is Ready to Progress
You can complete 10 deep diaphragmatic breaths without your belly doming
You can perform a heel slide or dead bug progression without coning or losing lumbar position
No leaking with impact activities like walking briskly, light jogging, or jumping
No pelvic heaviness during or after exercise
Your pelvic floor PT has cleared you for progressive loading
Why "Just Do Pilates" Isn't Always the Answer
Pilates and yoga are often recommended for postpartum core rehab — and both can be excellent, in the right context and with qualified instruction. The issue is that traditional Pilates exercises, particularly those involving spinal flexion under load, can create exactly the pressure dynamics we're trying to avoid in a newly postpartum core. A Pilates instructor who understands postpartum physiology and DR will modify accordingly. One who doesn't may inadvertently make things worse.
Any exercise modality can be appropriate postpartum — with the right framework, the right progressions, and clinical oversight when needed.
The MBODY Approach
Our postpartum programming starts with a pelvic floor PT evaluation that includes a functional assessment of core pressure management — not just a finger-width check of the gap. From there, we build a progression that meets you where you are and moves you systematically toward your goals, whether that's returning to running, lifting, a group fitness class, or simply carrying your baby without pain.
Babies are always welcome. And you don't need a referral to start.
→ Book a postpartum PT evaluation at MBODY in Westlake Village. mbodyptandwellness.com