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The Personal Trainer’s Guide to Diastasis Recti

by Jessie Mundell | Follow on Twitter

Diastasis recti, if untreated, will force your client to train their body to rely on other muscles (e.g., the hip flexors and spinal erectors) to stabilize their pelvis because the anterior core is now useless to them.

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The following article is written by Jessie Mundell — primary author of thePTDC’s Training New Moms package.


When I finish explaining to women about abdominal separations, or Diastasis Recti, there’s usually a look of shock and horror on their faces. “Will it ever go back together?” they ask worriedly.

Let’s set it straight. Yes, it is possible to heal a diastasis recti — with consistent and focused effort. Having an abdominal separation come fully back together is not the goal though.

What is Diastasis Recti?

Diastasis Recti (DR) isn’t something many people are talking about in the fitness industry, but it screams for your attention because as a trainer you could be making it much worse.

DR is the resulting separation of the rectus abdominis muscles bellies, as the line alba becomes stretched and lax. The most common cause of diastasis recti is pregnancy, although it can be seen in men and children too.

The rectus abdominis and line alba becomes stretched anteriorly and laterally by the growing fetus during pregnancy, and the linea alba can stretch and widen.

While the muscle bellies are usually held very close together, in a DR they’re now separated. It’s commonly thought that at DR has an inter-recti distance (IRD) of at least two finger widths, although it’s common to be as wide as 5-6 finger-widths, or even wider.

Likewise, where the connective tissue is normally strong and shallow, it can become weak and deep, as in “push your fingers into your belly and feel pulsing” deep.

Who cares if a client has a DR?

You should. Largely separated muscles and a lax linea alba are weakened support system. Limited support can lead to imbalanced muscle tone, postural deficiencies, and injuries that are waiting to happen.

If untreated your client will eventually train their body to rely on other muscles (e.g. hip flexors) to stabilize their pelvis because the anterior core is now useless to them.

As a result, their low back pain will be rampant and they’ll continue to look 5 months pregnant well into the postpartum stage. Where have we taken them? A potentially bigger separation, a mummy tummy that won’t quit, and zero progress in training.

How to check for Diastasis Recti?

First, I always recommend referring your prenatal and postnatal clients to a pelvic floor physiotherapist. The physio can ensure there’s not bigger issues going on (prolapsed uterus, rectum, or bladder), can assess the DR themselves, and can teach the client how to properly activate their abdominal and pelvic floor muscles (internal exams).

Checking for diastasis recti is an easy thing to do and important to learn in order to track progress throughout training.

Step 1: Get client to lie down flat on the back, as if they were setting up for a glute bridge.

Step 2: Have them take a couple diaphragmatic breaths and totally relax the abdominals and glutes.

Step 3: Firmly press 2-3 fingers just above their belly button with the fingers and hand running vertically along the linea alba, fingertips facing towards the head.

Step 4: Get the client to tuck the chin towards the chest and slowly lift their head off floor until you feel the sides of the muscle bellies just start to pull together. Have them repeat this 2-3 times to get an accurate measurement. You may need to add or takeaway fingers (or hands) to get the appropriate width. Mark down how many fingers wide the IRD is.

Step 5: In this position, see how far into the belly you can press your fingers down. This will tell you how overstretched the connective tissue is. Take note if the connective tissue feels really shallow and taut or if you can press your fingers into the belly quite far.

Step 6: Repeat Steps 4 & 5, 1.5-2 inches above and below the belly button.

Step 7: Repeat the assessment at the belly button, below the belly button, and above the belly button. However, this time just before the client does their head lift they will take an exhale breath and do a gentle pelvic floor lift. Record if there are differences in the feeling of the connection tissue or in the IRD.

(Note: In a well functioning core, we want to feel good tension in the linea alba when the client does their head lift and pelvic floor lift. In a diastasis that still requires healing, you will feel the linea alba stay lax with the head lift and pelvic floor lift.)

How to fix Diastasis Recti, and more importantly, not worsen it?

There’s specific exercise programming considerations regarding diastasis recti repair for your clients with DR. Here’s what you need to emphasize:

1. Learning how to roll over again. If your client is going from a supine to seated position, teach them to roll to their side first, then push themselves up using upper body strength to seated. This will avoid unnecessary forward pressure on the DR.

2. Ribs Over Hips. This is one of my favourite cues that I’ve adopted from Julie Wiebe. You want your client to keep their ribcage over their pelvis during exercise, so the connective tissue is not continually overstretched. Refer to this video from Tony Gentilcore on teaching your clients to “own their rib position.”

Note: Tony Gentilcore wrote a great blog on owning rib position that you can find it here:

3. Retrain breathing patterns. During and after pregnancy you might notice a flaring of the ribcage and an inability to take full diaphragmatic breaths through the whole core. We need to retrain the diaphragm and ribcage to fully expand and contract, in ribs over hips position. We want the client to feel a gentle softening of their pelvic floor and abdominals on their inhale breath, and a gentle contraction of their pelvic floor and abdominals on their exhale breath. See this video from Mike Robertson on correcting faulty breathing patterns.

Note: Mike Robertson wrote a great blog on correcting breathing patterns. You can find it here:

4. Neutral everything. Your one goal when doing abdominal training will be to keep as much direct pressure off the DR as possible. Start training basic pelvic alignment, proper pelvic floor contraction and relaxation, heel slides, deadbug variations, side planking, and Pallof pressing.

5. Pelvis resetting. You might find your client is now in the habit of being in a posteriorly or anteriorly tilted pelvic position. We need to train them to feel what more neutral alignment feels like in standing, seated, and supine exercises and in daily life tasks.

Just Say No

To quote one of my clients who refuses to do anything that resembles moving quickly or using kettlebells, “Just say no” to anything where you’re creating unmanaged internal abdominal pressure while treating the DR.

This means saying no to crunches, sit-ups, front loaded exercises (bird dogs, front planks, etc.), and any exercise where the client is forward flexed and can’t create enough tension to hold the belly in (e.g., conventional deadlifts). No belly bulging, no bearing down.

The good news? You’ll get to say yes to these things much sooner if you start the diastasis recti treatment immediately. Prenatal and postnatal training is one of the most under-served markets in our industry and these women deserve to be well taken care of by us, as coaches.


Want to learn more about post-natal fitness? Click the banner to claim your free report:

Extra Reading:

Advice for training pregnant clientele – Jessie Mundell on thePTDC

Post-natal exercise programming – Jessie Mundell on thePTDC

Tupler Technique:

The Tummy Team:

Diane Lee:

About the Author
Jessie Mundell

Jessie Mundell is a personal trainer in Calgary, Alberta and also runs an trains clients online. Her specialities lie in prenatal and postnatal exercise and female training. You can find her on Facebook, Twitter ,or read more of her work on her website.