Diastasis Recti and Pilates: Can It Help, and What Should You Avoid?

By Katherine, Lead Instructor, Certified Pilates Instructor · Last updated: September 2026

Pilates may help diastasis recti, but the evidence is thin: one small randomized trial found a four-week postpartum Pilates program narrowed the abdominal gap and improved abdominal endurance compared with no exercise. A larger 2025 analysis suggests combined programs, such as exercise with electrical stimulation and breathing work, may do more, and today's focus is on core function and tension, not just closing the gap.

Key takeaways

• Diastasis recti (separation at the linea alba, the connective tissue between your abdominal muscles) is very common during and after pregnancy (about 60% of first-time mothers at 6 weeks postpartum in one study), not a sign that something has gone wrong.

• A self-check can flag a possible gap, but only a professional assessment confirms its width, depth and how well your core manages pressure.

• Evidence for Pilates specifically comes from one small randomized trial; a larger analysis suggests combined approaches (exercise plus other therapies) may outperform exercise alone.

• Modern practice weighs tension and function in the midline as much as the width of the gap itself — doming or coning during an exercise is treated as feedback to modify the movement, not a reason to abandon core work.

• Most core exercises are modified in the early postpartum period and reintroduced gradually; a pelvic health physiotherapist can guide timing and flag anything that needs more than exercise.

What is diastasis recti, and is it normal?

Diastasis recti abdominis is a separation of the two sides of the rectus abdominis (the "six-pack" muscle) at the linea alba, the band of connective tissue running down the midline of your abdomen (Cleveland Clinic). As your uterus grows, this tissue stretches to make room, and some widening is a normal, expected part of pregnancy rather than an injury.

It is also extremely common. A prospective study of 300 first-time mothers found diastasis recti in 33.1% of women at 21 weeks of pregnancy, rising to 60.0% at 6 weeks postpartum, then easing to 45.4% at 6 months and 32.6% at 12 months postpartum (Sperstad et al., 2016). A gap in the first weeks after birth is typical, and in that study many women no longer met the threshold for diastasis recti by 12 months postpartum (Sperstad et al., 2016). If you're earlier in pregnancy and wondering whether Pilates is appropriate at all, our trimester-by-trimester pregnancy guide covers that.

How do I know if I have diastasis recti?

A simple self-check can flag a possible gap: lying on your back with knees bent, lift your head and shoulders slightly, and feel along the midline of your abdomen (just above and around the belly button) for a gap between the muscle ridges. Cleveland Clinic describes a gap wider than about 2 centimetres as diastasis recti, which people often feel as a gap of two or more finger-widths (Cleveland Clinic).

That said, a self-check is a screening tool, not a diagnosis. It tells you about width but not depth, tension, or how well your core is managing load — the things that matter most for what to do next. A pelvic health physiotherapist or your doctor can assess this properly, sometimes with a tape measure, calipers or ultrasound, and can flag signs of something that needs medical follow-up, such as a hernia (Cleveland Clinic).

Can Pilates help diastasis recti? What the evidence actually says

Here the honest answer is: possibly, but the evidence is thin. A small randomized controlled trial assigned 20 first-time postpartum mothers to a Pilates program (50 minutes a day, 5 days a week, for 4 weeks) and 15 to a no-intervention control group. The Pilates group showed statistically significant improvements in inter-recti distance, waist circumference and abdominal muscle endurance versus control (p<0.05); the control group showed no such improvement (Lee et al., 2023). That is one small trial, not a systematic review — a promising early signal, not proof.

A much larger 2025 network meta-analysis pooling 27 randomized trials and 1,340 postpartum women compared conservative treatments for diastasis recti, including exercise programs, neuromuscular electrical stimulation, abdominal binders and kinesio taping. Comprehensive exercise engaging both deep and superficial abdominal muscles, especially combined with neuromuscular electrical stimulation and breathing work, appeared more effective at reducing inter-recti distance than single-muscle or passive approaches, though certainty ranged from low to high across comparisons and further trials are needed (Bigdeli et al., 2025). Put plainly: Pilates-style exercise is a reasonable option to discuss with your care provider, but it isn't established as the single best or fastest way to close a diastasis, and a combined approach may do more.

Is closing the gap the goal? A more modern view

Rehabilitation research has shifted away from treating "closing the gap" as the finish line. A 2024 scoping review notes that the linea alba's ability to generate and transfer tension is now considered more important for abdominal wall function than complete closure of the gap, and that a person's function, neuromuscular control and muscle capacity may be of greater clinical value than gap width alone (Skoura et al., 2024). Two people can share the same measured gap and have very different function.

This is also why "engaging your core" during Pilates work matters as much as which exercise you're doing. We'll cover what that phrase actually means, and how it applies to a diastasis, in a companion post on core engagement in Pilates.

What does "doming" or "coning" mean, and should I stop if I see it?

Doming (sometimes called coning) is when the midline of your abdomen bulges or ridges upward during an exercise like a curl-up, instead of staying flat. Ultrasound research on women with diastasis recti found the linea alba became more distorted (deviating from a straight, taut line) when the inter-recti distance narrowed during an unmodified curl-up, and that activating the deep abdominal (transversus abdominis) muscle first reduced that distortion (Lee & Hodges, 2016).

Practically, that makes doming useful feedback, not an alarm bell: it signals your core isn't yet managing pressure well in that position, so an instructor will usually cue a gentler variation or less range of motion — not tell you to avoid core work altogether. Sharp pain, a bulge that doesn't flatten, or heaviness low in the pelvis are different signals worth mentioning to your instructor and health care provider.

Are certain exercises off-limits with diastasis recti?

Early on, instructors commonly modify or temporarily set aside moves that load the flexed, rotated midline heavily — full sit-ups, some plank and roll-up variations, deep twisting — in favour of breath-led, deep-core work. A 2024 scoping review of postpartum rehabilitation recommends that exercise progression be individualized to each person's needs, function and progress, rather than following one fixed protocol (Skoura et al., 2024). We adapt sessions to where you are in that progression, and work alongside your health care provider on anything outside our scope.

Pelvic floor considerations often come up alongside diastasis recti, since both are affected by how you manage pressure through your trunk. We go into that separately in Pilates for Your Pelvic Floor: Leaks, Kegels and Prolapse Explained.

When should I see a pelvic health physiotherapist?

It's worth arranging a pelvic health physiotherapy assessment if you notice a persistent gap of two finger-widths or more, a visible bulge or doming that doesn't settle, ongoing lower back or pelvic pain, leaking urine, a feeling of heaviness in the pelvis, or if you're simply unsure and want a professional opinion before progressing. A physiotherapist can also help you choose between exercise alone and a combined plan; see Pilates or Physiotherapy? How to Choose (and When to Do Both) for how the two typically work together. If you're still working out timing after birth more generally, When Can You Start Pilates After Giving Birth? covers that groundwork.

How long does diastasis recti take to heal?

There's no single timeline. In the study above, the share of women with diastasis recti fell steadily over the first year, but about a third still met the threshold at 12 months postpartum (Sperstad et al., 2016). For some, separation persists longer, and that isn't a personal failure — it's one reason the current emphasis is on function rather than a number on a tape measure.

Private postnatal sessions in Markham

If you're not sure where your core stands or how to progress safely, our Private 1:1 Pilates with Instructor (1 hr) sessions let us adapt each session to your needs and timeline, working alongside your health care provider, rather than following a one-size-fits-all class. See availability and book a session online at our Markham studio.

Frequently asked questions

Will diastasis recti go away on its own without exercise?

For many women the gap narrows over the first year: in one study of 300 first-time mothers, the share with diastasis recti fell from 60% at 6 weeks postpartum to about 33% at 12 months (Sperstad et al., 2016). Others are left with some persistent separation; targeted exercise, and sometimes combined therapies, appear to help more than doing nothing (Bigdeli et al., 2025).

Is it safe to do planks or sit-ups with diastasis recti?

Usually modified rather than banned outright — for example a shortened-range or supported plank, or a curl-up with the deep abdominals engaged first, which one ultrasound study found reduced distortion of the linea alba (Lee & Hodges, 2016). An instructor watching for doming adjusts the exercise to your tissue tolerance rather than removing it entirely. Check with your health care provider or a pelvic health physiotherapist before reintroducing planks or curl-ups postpartum.

Can diastasis recti happen outside of pregnancy?

Diastasis recti is most studied in pregnancy and postpartum, where it's very common, but the underlying separation can occur in other people too, including through significant weight change or heavy strain on the abdominal wall (Cleveland Clinic). A health care provider or pelvic health physiotherapist can assess a midline gap the same way regardless of cause.

Does having diastasis recti mean I'll have a weaker core forever?

Not necessarily. A measured gap doesn't map neatly onto strength or function — a 2024 scoping review suggests that how well the linea alba transfers tension, and how well you coordinate your deep core, may matter more than the gap width alone (Skoura et al., 2024). If you'd like a professional opinion on your specific case, our guide to choosing between Pilates and physiotherapy can help you decide.

Can Pilates alone close my diastasis recti quickly?

No study supports a quick or guaranteed fix from exercise alone. The evidence is a single small trial for Pilates specifically, and a larger analysis suggests combined approaches may reduce the gap more than exercise alone (Lee et al., 2023; Bigdeli et al., 2025).

Safety note: This article is general information, not medical advice, and does not replace an individual assessment. If you are pregnant or postpartum and have concerns about abdominal separation, talk with your family doctor, obstetric care provider, surgeon (if you had a caesarean birth), or a pelvic health physiotherapist before starting or changing an exercise program. Get clearance from your care provider before resuming abdominal exercise after birth (postpartum return-to-exercise timing covers this in detail). Seek urgent care for a painful bulge you cannot push back in. Stop and seek medical attention for a bulge that doesn't flatten when you relax, sharp or worsening abdominal pain, heaviness or pressure in the pelvis, leaking urine or stool, or any new or worsening pain during exercise.

Sources

1. Sperstad JB, Tennfjord MK, Hilde G, Ellström-Engh M, Bø K (2016). Diastasis recti abdominis during pregnancy and 12 months after childbirth: prevalence, risk factors and report of lumbopelvic pain. British Journal of Sports Medicine, 50(17), 1092–1096. https://pubmed.ncbi.nlm.nih.gov/27324871/

2. Cleveland Clinic (2025). Diastasis Recti (Abdominal Separation): Causes & Treatment. https://my.clevelandclinic.org/health/diseases/22346-diastasis-recti

3. Lee N, Bae YH, Fong SSM, Lee WH (2023). Effects of Pilates on inter-recti distance, thickness of rectus abdominis, waist circumference and abdominal muscle endurance in primiparous women. BMC Women's Health, 23, 626. https://pubmed.ncbi.nlm.nih.gov/38008749/

4. Bigdeli N, Yalfani A, Doosti-Irani A, Qodrati A (2025). An evidence-based comparison of rehabilitation strategies for diastasis recti abdominis in postpartum women: a systematic review and network meta-analysis. Scientific Reports, 15, 39591. https://www.nature.com/articles/s41598-025-22574-2

5. Skoura A, Billis E, Papanikolaou DT, et al. (2024). Diastasis recti abdominis rehabilitation in the postpartum period: a scoping review of current clinical practice. International Urogynecology Journal, 35(3), 491–520. https://doi.org/10.1007/s00192-024-05727-1

6. Lee D, Hodges PW (2016). Behavior of the linea alba during a curl-up task in diastasis rectus abdominis: an observational study. Journal of Orthopaedic & Sports Physical Therapy, 46(7), 580–589. https://www.jospt.org/doi/10.2519/jospt.2016.6536