Diastasis Recti and the Abdominal Wall: Conservative Rehabilitation Only

Diastasis recti is a widening of the gap between the two halves of the rectus abdominis along the midline, and conservative rehabilitation is aimed at how the abdominal wall behaves under load rather than at closing a measurement. The wall is one side of a pressure system whose base is the pelvic floor, which is why the two are assessed together and why an appointment about your abdomen will include questions about your bladder.

I did not have a persistent diastasis after either birth, so this article is not written from the inside of the condition. What I did have was an assumption that my abdominal wall and my pelvic floor were separate projects, which is exactly the assumption that made me spend eleven years bracing my abdomen hard during pelvic floor exercises and calling it effort. Read red flags and when to stop and get checked first.

What it is, and what it is not

A separation along a connective tissue seam, not a tear and not a hernia.

The rectus abdominis runs in two halves down the front of the abdomen, joined along the midline by connective tissue called the linea alba. In pregnancy that tissue stretches and the two halves move apart, which is a normal and necessary accommodation rather than an injury. After birth it usually narrows again over the following months.

It becomes a clinical question when it persists and when the abdominal wall does not manage load well. The distinguishing features people notice are a visible ridge or doming along the midline when they sit up or strain, a sense of the middle giving way under effort, and sometimes low back or pelvic discomfort with load. This site covers conservative rehabilitation only: there is no surgical decision content here, no operation costs and no post-operative recovery timelines.

Why the gap is a poor outcome measure

Because a measurement of width says nothing about whether the wall can generate tension.

Two people with the same measured gap can behave completely differently under load. One generates tension across the midline, keeps the wall flat, and manages pressure without bulging. The other domes, loses tension, and pushes pressure downwards. The second has the problem, regardless of what the tape measures, and closing a gap by a centimetre in the first person changes very little.

That is why rehabilitation is aimed at function. The useful questions are whether tension can be generated across the midline, what happens to the wall under effort, and what you can do without symptoms. A target number is easier to talk about and worse at describing what is wrong.

The figures that are not here

No prevalence figure for diastasis recti and no effect size for conservative rehabilitation of it appears in the sourced evidence base behind this site, so neither is published here.

Prevalence estimates for this vary enormously depending on three choices: where the measurement is taken relative to the navel, what width counts as a diastasis, and how long after birth the measurement is made. Change any one and the answer moves substantially. A percentage quoted without those three details is not interpretable, and this site would rather say so than pass one on.

The house rule behind that is worth restating because it applies across the site: a figure appears here only if it has been checked against a primary source. That is why the numbers on this page all concern the pelvic floor rather than the abdominal wall.

Why the pelvic floor keeps appearing in an abdominal article

Because both are walls of the same container.

The diaphragm forms the lid, the abdominal wall the front, the spine and its muscles the back, and the pelvic floor the base. Every cough, lift, laugh, strain and landing raises the pressure inside it, and the four walls share the job of managing that. A front wall that cannot generate tension changes what the base has to absorb, and a base that fails changes what happens above it.

That shared mechanics is the reason the two are assessed together in practice, and it is why what is the pelvic floor describes the floor as part of a pressure system rather than as an isolated muscle. It is also why straining on the toilet matters here as much as it does for prolapse: it is a daily, high-pressure load applied to the same container, which is covered in bowel habit and defaecation technique.

What the pelvic floor evidence on this site actually covers

Continence, and it is worth quoting precisely so that nobody reads it as evidence about abdominal walls.

The relevant recommendations are in NICE NG210, which covers urinary incontinence, bladder emptying disorders, faecal incontinence, bowel emptying disorders, prolapse, sexual dysfunction and chronic pelvic pain for women aged 12 and over, and specifies that programmes should be supervised by a physiotherapist or other healthcare professional with the appropriate expertise, with at least one review to assess progress during a programme and one at the end¹. Diastasis recti is not among the conditions that guideline covers.

For the postnatal period, the strongest available figures concern bladders. A systematic review of postpartum urinary incontinence found a pooled prevalence in the first 3 months after birth of 33% for any incontinence, 12% weekly and 3% daily, with 31% after vaginal delivery against 15% after caesarean section². In the Cochrane review of antenatal and postnatal training, continent women who began training in pregnancy were about 29% less likely to report urinary incontinence at 3 to 6 months postpartum, 251 per 1,000 against 179 per 1,000, graded high certainty³. The World Health Organization does not recommend starting routine pelvic floor muscle training after childbirth as prevention, while advising that women who are leaking small volumes of urine after childbirth be told about its benefits as treatment⁴.

Those are bladder findings. They belong on this page only because the two structures share a pressure system, and postnatal pelvic floor recovery sets them out in full.

What conservative rehabilitation addresses

Pressure management, graded load, and the habits that undo both.

An assessment establishes what the abdominal wall does under effort, what the pelvic floor does, how you breathe under load, and what activities produce symptoms. From there the work is typically about restoring the ability to generate tension across the midline, staging load so that the wall is challenged without being overwhelmed, and changing the daily patterns that raise pressure unhelpfully: how you get out of bed, how you lift a toddler, and whether you strain on the toilet.

There is no exercise prescription on this page. That is deliberate rather than coy: a programme is set against an assessment of what your wall and floor actually do, and progressed at reviews, and a webpage can do neither. The widely circulated lists of forbidden exercises are a poor substitute for somebody watching how you manage pressure, because the same movement can be appropriate for one person and premature for another. Pelvic floor exercise programmes explained covers how a real programme is built, and returning to running and lifting covers staging load back in.

Why the pelvic floor part has to be checked rather than assumed

Because people cannot reliably tell what that muscle is doing, and abdominal bracing is one of the classic substitutions.

In 47 women referred for urodynamic evaluation of urinary incontinence, only 49% achieved an ideal contraction after brief standardised verbal instruction and 25% performed a technique that could potentially promote incontinence, with the authors concluding that simple verbal or written instruction is not adequate preparation for starting a programme⁵. That was a referred, symptomatic population in 1991 and not a claim about everyone: in 779 women attending community-based primary care practices, correct contraction on the first attempt ranged from 68.6% to 85.8% and 78% of those who got it wrong learned after brief instruction⁶.

The substitution point is the one that matters in an abdominal context. Hard abdominal bracing feels like effort and can be mistaken for a pelvic floor contraction, and it also raises intra-abdominal pressure, which is the opposite of what a floor under strain needs. That is precisely what I had been doing for eleven years without knowing. A review of the field puts the general position plainly: supervised and more intensive training is more effective than unsupervised training, and training needs proper instruction and close follow-up to be effective⁷. How to do a pelvic floor contraction correctly describes the movement, and hypertonic pelvic floor and downtraining covers what to do if effort makes symptoms worse.

Getting seen for it, and one concrete illustration of how narrow access can be

This is one of the presentations where access is patchiest, and there is a specific example worth knowing.

NHS physiotherapy is free at the point of use, with the NHS itself noting there may be a long waiting list, and in many areas community musculoskeletal services can be reached without a GP referral⁸. Pelvic health self-referral specifically is far more restricted, and where it exists it is often confined to pregnancy and the first year after birth.

The concrete illustration: one NHS trust with a confirmed open pelvic health self-referral route, North Bristol NHS Trust, restricts it to women and people assigned female at birth aged 16 and over resident in three named areas, and explicitly excludes men, children and diastasis recti from that route. That is one trust’s criteria rather than a national rule, and that is exactly the point: eligibility is set service by service, so the only reliable move is to read the criteria of the service you are actually trying to reach. Getting referred to pelvic health physiotherapy sets out the routes across five health systems, and pelvic health physiotherapy waiting times covers what is and is not published about how long any of it takes.

What to ask before you start

Three questions worth having written down.

What is being measured, and how will progress be judged: a width, a function, or both. What load is appropriate now, and what is being staged for later, since “avoid crunches” is not a programme. And whether the pelvic floor has been assessed on its own terms rather than assumed to be fine because the abdominal wall is the presenting problem.

Questions to ask at your first appointment covers the wider set, what happens at a pelvic health physio assessment covers what an assessment involves, and pelvic floor physiotherapy sets out the treatment this site is built around.