Most people meet the term diastasis recti the same way: a hand on the belly after birth, fingers sinking into a soft gap down the middle that didn't used to be there. It can be a shock. The good news is that this is one of the most common, most manageable changes the abdominal wall goes through, and a lot of the worry eases once you have current, honest information.
This guide walks through what diastasis recti actually is, how to check yourself at home, the symptoms that matter beyond the gap, which exercises help and when to start them, how support garments fit, what it looks like in men, whether it can still improve years later, and when surgery is genuinely on the table, including what it realistically costs in Australia. One thing has shifted in the research over the past couple of years, and it is worth saying up front: the newer, larger studies show that the right exercise does reduce the separation, not just the way your core feels. Both matter.
What is diastasis recti (and how it differs from a hernia)
Your rectus abdominis is the pair of long muscles running down the front of your abdomen, the ones people call the "six-pack". A band of connective tissue called the linea alba joins them down the midline. Diastasis recti, also called abdominal separation or DRAM (diastasis of the rectus abdominis muscle), is when that midline tissue stretches and thins so the two muscle bellies sit further apart than usual.
It is extremely common in late pregnancy. The growing uterus stretches the abdominal wall, and the linea alba gives way to make room. Prevalence falls over the first year after birth, but around one in three women still have a measurable separation at 12 months. Australia's Pregnancy, Birth and Baby service describes it as a natural adaptation rather than an injury, which is a helpful way to hold it. It also happens outside pregnancy, in men and women, usually linked to ongoing pressure on the abdominal wall.
A diastasis is not a hernia, and the difference matters. With a diastasis, the linea alba is stretched and thin but still intact. The muscles have moved apart, but there is no hole in the abdominal wall. A hernia is a defect, an actual gap in the connective tissue or muscle through which abdominal contents can push, often felt as a firm bulge that may be tender. The two can coexist, and a small umbilical hernia sometimes hides inside a diastasis. If you feel a distinct, firm lump that hurts, that doesn't flatten when you lie down, or that becomes painful, that is a reason to see your GP rather than assume it is just the gap.
How to check for diastasis recti at home (the finger test)
You can do a rough self-check in a couple of minutes. It is not a diagnosis, but it tells you whether to look into it further. Here is the finger test most physios teach:
- Lie on your back with your knees bent and feet flat on the floor.
- Place your fingers just above your belly button, fingertips pointing down toward your toes, palm facing you.
- Lift your head and shoulders slightly off the floor, the way you would at the very start of a sit-up. Stop as soon as you feel the muscles engage.
- Feel for the gap. As you lift, the two muscle edges firm up on either side of your fingers. Notice how many fingers fit into the soft space between them, and how deep your fingers sink before they hit resistance.
- Repeat above and below the belly button. Check at the level of the navel, roughly 5cm above it, and roughly 5cm below. Separation can be wider in one spot than another.
Two things matter here, and the second is the one most people miss. The first is width, measured in finger-widths. The second is depth and springiness: as you lift, does the midline tissue firm up and create a shelf for your fingers, or do they keep sinking into a soft gap? That tension in the linea alba is a big part of how well the core transfers load, so it is worth noticing alongside the width. A separation of more than about two finger-widths (roughly 2cm) is generally considered a diastasis, but a narrow gap with no tension can trouble you more than a wider gap that firms up well.
If you are in the early weeks after birth, expect a gap. That is normal and not a sign anything has gone wrong. The question is how it tracks over the months that follow, and what you do with that time.
Symptoms beyond the gap
A diastasis is often painless, and plenty of people only notice the cosmetic change. But when symptoms do show up, they tend to be about how the core is working:
- A belly that "domes" or "cones" - a ridge that pushes up along the midline when you sit up from lying down, lift something heavy, or get out of bed.
- A feeling of core weakness - your middle feels unsupported when you lift a toddler, a laundry basket, or a heavy bag.
- A persistent rounded lower belly - sometimes described as still looking pregnant months after birth, even as weight settles elsewhere.
- Low back or pelvic discomfort - the abdominal wall is part of how your trunk transfers load, so when it isn't sharing the work, the back and pelvis can take more.
- A link with pelvic floor symptoms - the abdominal wall and pelvic floor work as one pressure system, and some people with a diastasis also notice leaking or heaviness. If leaking is part of your picture, it helps to work out whether it's urge or stress leakage, because the two are managed differently.
Bloating and bowel changes are not symptoms of diastasis itself, though a soft midline can make normal bloating more visible. The headline is simple: it is usually the loss of support and the doming, as much as the gap measurement, that bother people day to day.
Exercises: what helps and when to start
This is the part that has genuinely moved. For years the honest answer was that exercise might help you feel stronger but probably would not change the separation itself. The larger, more recent research tells a better story. A 2025 network meta-analysis in Scientific Reports pooled 27 trials and more than 1,300 women and found that active exercise programmes reduce the inter-recti distance, with the biggest effect coming from programmes that train the deep and superficial abdominal muscles together rather than in isolation. A 2025 network meta-analysis in Sports Medicine reached the same shape of answer across 21 trials: treatments that included exercise outranked those without it for narrowing the gap.
So the current physio position is not function instead of the gap. It is both. The goal is a core that does its job, holds load, controls pressure, supports your back and lets you live and train without doming, and the research now says a well-built exercise programme also narrows the separation along the way. What it will not do is deliver a specific number of centimetres on a promised date, and any blog offering that is overselling it.
What works, in the studies and in the clinic, is a progression rather than a fixed list. It starts with connecting to the deep abdominal muscles and the pelvic floor, then gradually adds load as your control improves:
- Start with breath and connection - gentle activation of the deep core and pelvic floor on an exhale, with your ribs and pelvis stacked. Pre-tensioning the deep muscles firms the linea alba, which is the foundation everything else builds on.
- Add both deep and superficial work over time - the strongest results in the research come from programmes that eventually train the whole abdominal wall together, not the deep muscles alone. Curl-ups have been shown to build strength without widening the gap, so they are a step you earn, not a movement banned for life.
- Progress the load slowly - heel slides, pelvic tilts, supported leg movements and graded lifting, adding difficulty only when you can keep the midline flat and the breath flowing.
- Watch for doming as your signal - if a movement makes the midline cone up, it is too much for your core right now. Regress it, rebuild control, and come back to it. Doming is information, not failure.
On timing, the old advice to brace and rest for months before loading has not held up. The newer evidence points the other way. A 2026 systematic review in Hernia found that structured exercise reduced the separation more when it started early, within the first three months after birth, than when it started after six months, which the authors described as a window worth using rather than waiting out. Early does not mean heavy. It means gentle, graded, pelvic-floor-aware loading started sooner, guided by how your midline responds.
A few things are worth holding off on while your core control is still building, because they spike abdominal pressure faster than the deep system can manage it: traditional sit-ups and crunches done for volume, full planks, double-leg lifts, and heavy loaded twisting. Pregnancy, Birth and Baby gives the same early steer, favouring pelvic tilts and gentle bracing over sit-ups and crunches while the muscles are separated. None of these are banned forever. They are later steps, earned once you can load the midline without it doming. This is why working out with diastasis recti is so doable. You don't have to stop training, you have to sequence it, and a pelvic physiotherapist can tell you which movements you have already earned.
Do support garments and abdominal binders help?
Short version: a support garment or abdominal binder is a reasonable, evidence-backed helper, best used as an adjunct to your exercise rather than a fix on its own. Two things are worth separating out.
The first is comfort. In the early weeks, when the abdominal wall feels unsupported and getting out of bed or lifting your baby feels like hard work, gentle compression makes movement easier, and after a caesarean it measurably eases early pain. That comfort often means you move sooner, which helps everything else.
The second is the separation itself. Here the newer research is kinder to binding than older advice suggested. In the 2025 network meta-analyses, abdominal binding as a category produced a small but real reduction in the inter-recti distance, on the order of a centimetre. That puts it mid-pack: better than doing nothing, and a sensible support layer, but outperformed by active exercise and by exercise-plus-binding together. The consensus among physios is to use a garment as an adjunct rather than a primary treatment, to avoid leaning on it so heavily that the muscles never take up the work, and to wean off it as your own strength returns. No garment closes a diastasis by itself, and any product claiming to fix the separation is overstepping.
This is where the SRC postpartum recovery range fits. The SRC Postpartum Recovery Shorts and Recovery Leggings use graduated, medical-grade compression designed to support the abdomen and pelvic area in the weeks after birth, and if you've had a caesarean, the C-Section Recovery Shorts are cut with that recovery in mind. Their role is support and comfort while your own core does the rehabilitation work. Think of a garment as a helpful layer alongside your physio plan, not a replacement for it. If you're not sure which suits your stage of recovery, the team at Blossom Pelvic Health can help match it to what your physio has suggested.
Diastasis recti in men
Diastasis recti is talked about as a postpartum thing, and in Australia almost nobody addresses it in men. But men get it too, and it is more common than the silence suggests. A large cross-sectional study in the journal Hernia looked specifically at diastasis of the rectus abdominis in men and found it in a meaningful share of those assessed, about one in ten at the stricter measure and closer to three in ten at a wider one. Older age, higher body weight and smoking were among the associated factors, and wider separations went hand in hand with a co-existing hernia.
In men, the usual drivers are sustained pressure on the abdominal wall over time: carrying more weight around the middle, heavy lifting with poor pressure control, chronic straining, and sometimes a genetic tendency in the connective tissue. The presentation is similar to women outside pregnancy: a midline bulge or ridge that pops out when sitting up or straining, a sense of core weakness, and sometimes back discomfort.
The approach is the same too. Self-check with the finger test, focus on rebuilding core control and pressure management, expecting the gap to respond as your deep and superficial abdominal work progresses, and get a hernia ruled out if there is a firm, tender, or painful lump. If you are a man reading this and recognising yourself, you are not an odd case. You are part of a group the fitness internet has mostly ignored, and the same physio-led progression that works for postpartum cores works for yours.
Can diastasis recti still improve years later?
Yes, and this is the question that brings a lot of people to this page years after the fact. The common belief is that there is a closing window, that if it hasn't resolved within the first year it is fixed forever. That is not how muscle and connective tissue work.
The honest picture has two halves. Most of the spontaneous, do-nothing narrowing happens in the first year: prevalence falls over those months but still affects around one in three women at 12 months. So a lot of the automatic recovery is done by the one-year mark. But spontaneous narrowing plateauing is not the same as nothing can improve. The exercise trials that show reductions in the separation include women well past the early postpartum window, which means a structured programme can still change both how the core works and, to a degree, the gap itself, long after the baby years.
What improves most reliably is function: core control, pressure management, the doming, the back support, the confidence to lift and train. Those are trainable at any point because they depend on how well you recruit and coordinate muscle. Many people years out from a diastasis get meaningful change in how their core works and feels, often with some narrowing of the gap as well. A pelvic physiotherapist is the right starting point for a years-later diastasis, because an individual assessment tells you how much is muscle control to retrain and how much, if any, is a structural issue that rehab can't reach on its own.
When surgery is actually indicated (and what it costs in Australia)
Surgery for diastasis recti, an abdominoplasty or abdominal wall repair, is real and sometimes the right call. But it is the exception, not the default, and it sits at the end of the road, not the start.
Conservative rehabilitation comes first, every time. Most diastasis improves enough through physio-led core work that surgery never enters the conversation. Surgery becomes a genuine consideration when a few things line up: a wide separation that has not responded to a proper, sustained course of rehabilitation; ongoing functional problems like significant core weakness, back pain, or pelvic floor dysfunction that rehab hasn't resolved; or a co-existing hernia that needs repairing anyway. A separation that bothers someone purely cosmetically is a personal decision, and a reasonable one, but it is elective rather than medically necessary.
Now the cost reality, because very few pages spell it out. Since 1 July 2022, Medicare has had an item for post-pregnancy abdominoplasty (item 30175), and the bar is deliberately high: a separation of at least 3cm confirmed on imaging, symptoms such as pain at the site during functional use, low back pain or urinary symptoms, and documented failure of conservative treatment including physiotherapy. Meet those criteria and Medicare plus private hospital cover can take a real slice off the bill, though out-of-pocket costs of several thousand dollars are still common. Miss them and the operation is classed as cosmetic: no Medicare rebate, no private health contribution, and quotes in Australia commonly land between roughly $10,000 and $30,000 once surgeon, anaesthetist and hospital fees are counted. That is worth knowing before you set your heart on a surgical fix, and it is one more reason the physio-first route earns its place.
What surgery is not is a shortcut past rehab. Even when an operation is the right choice, core rehabilitation before and after it improves the result, because the surgery repositions the tissue but your muscles still have to learn to use it well. The decision belongs with a specialist, usually a plastic or general surgeon, ideally after you have worked with a pelvic physiotherapist who can tell you whether you have exhausted what conservative care can offer. Going in having done the rehab means you make the call from a position of knowing, not guessing.
References
- Bigdeli N, et al. An evidence-based comparison of rehabilitation strategies for diastasis recti abdominis in postpartum women: a systematic review and network meta-analysis. Scientific Reports. 2025;15. https://www.nature.com/articles/s41598-025-22574-2
- Wu M, Huang J, et al. Comparative efficacy and acceptability of non-surgical treatments with or without exercise for diastasis recti abdominis in postpartum women: a network meta-analysis of randomised controlled trials. Sports Medicine. 2025. https://doi.org/10.1007/s40279-025-02179-5
- Non-operative management of postpartum diastasis recti: a systematic review and meta-analysis of randomised controlled trials. Hernia. 2026. https://doi.org/10.1007/s10029-026-03671-1
- Gluppe S, Ellström Engh M, Bø K. Curl-up exercises improve abdominal muscle strength without worsening inter-recti distance in women with diastasis recti abdominis postpartum: a randomised controlled trial. Journal of Physiotherapy. 2023;69(3):160-167. https://pubmed.ncbi.nlm.nih.gov/37286390/
- Benjamin DR, Frawley HC, Shields N, et al. Conservative interventions may have little effect on reducing diastasis of the rectus abdominis in postnatal women: a systematic review and meta-analysis. Physiotherapy. 2023;119:54-71. https://doi.org/10.1016/j.physio.2023.02.002
- Sperstad JB, Tennfjord MK, Hilde G, Ellström-Engh M, Bø K. Diastasis recti abdominis during pregnancy and 12 months after childbirth: prevalence, risk factors and report of lumbopelvic pain. British Journal of Sports Medicine. 2016;50(17):1092-1096. https://pubmed.ncbi.nlm.nih.gov/27324871/
- Zhu C, Shen Y, Wang L, et al. Prevalence, risk factors, and adverse outcomes of diastasis of rectus abdominis in men: a cross-sectional study. Hernia. 2025;29:31. https://doi.org/10.1007/s10029-024-03225-3
- Pregnancy, Birth and Baby (Healthdirect Australia). Abdominal separation (diastasis recti). https://www.pregnancybirthbaby.org.au/abdominal-separation
- Australian Government Department of Health. Medicare Benefits Schedule item 30175 (abdominoplasty following pregnancy). https://www.mbsonline.gov.au/internet/mbsonline/publishing.nsf/Content/Factsheet-30175
