Condition guide · Women's health
Diastasis Recti
The separation between the abdominal muscles that follows most pregnancies. Exercise narrows the gap by a small amount — less than half a centimetre on average. That does not make exercise pointless; it means the gap is the wrong thing to be measuring.
In plain words. The two halves of the "six-pack" muscle are joined down the middle by a band of connective tissue. During pregnancy that band stretches and the muscles move apart. That separation is called diastasis recti, and it is a normal consequence of carrying a baby rather than an injury.
Most of it recovers on its own in the months after birth. Abdominal exercise produces a further reduction in the gap, but a small one — around 0.43 cm on the best current estimate. The more useful question is not how wide the gap is, but what your abdomen and pelvic floor can do.
Key points
- Abdominal exercise does reduce the gap, slightly. Moderate certainty evidence from six trials (161 women): a reduction in inter-recti distance of 0.43 cm (95% CI -0.82 to -0.05) compared with usual care. [1]
- The reviewers judged that not clinically significant. Their conclusion is that conservative interventions do not lead to clinically significant reductions in inter-recti distance. [1]
- But they may help in other ways. The same conclusion adds that abdominal exercises may have other physical and psychosocial benefits. [1]
- An earlier review reached the same place from different data — very low quality evidence that transversus abdominis training reduced the gap (MD -0.63 cm, 95% CI -1.25 to -0.01). [2]
- Pelvic floor muscle training alone did not close the gap — low to very low quality evidence that it was no better than minimal intervention. [2]
- Pelvic floor training does something else valuable. It reduced the odds of urinary incontinence by 37% (OR 0.63, 95% CI 0.41 to 0.97) and pelvic organ prolapse by 56% (OR 0.44, 95% CI 0.21 to 0.91), on moderate certainty. [3]
- Nobody has studied prevention during pregnancy. Of 16 trials, none evaluated interventions in the antenatal period. [1]
- No specific programme can be recommended over another on the current evidence. [2]
What is actually happening
The rectus abdominis runs in two vertical halves down the front of the abdomen, joined at the midline by the linea alba, a band of connective tissue. As the uterus grows, the linea alba stretches and thins and the two halves separate. The distance between them is called the inter-recti distance.
This is a normal adaptation, not a tear. The tissue is not ruptured, and nothing has come apart that was supposed to be joined by muscle. The linea alba is doing what it is designed to do under sustained stretch.
After birth the gap narrows substantially over the following months without any treatment. Some separation commonly remains, and for many women that is simply how their abdomen now is. Whether it causes a problem depends much less on the width than on how well the abdominal wall generates and transmits tension.
What it feels like
- A visible ridge or doming down the middle of the abdomen when sitting up from lying, or when lifting.
- A softness or gap you can feel with your fingers alongside the midline.
- A sense that the abdomen is weak, or that the tummy "won't hold in".
- Sometimes low back or pelvic discomfort, and sometimes bladder symptoms — though those have their own causes and are not automatically due to the gap.
- Frequently, no symptoms at all beyond appearance.
The distress this causes is often about how the abdomen looks, and that is a legitimate reason to seek help. It is worth separating it from the question of whether anything is damaged, because those two things call for different conversations.
How it is diagnosed
By examination — feeling the width of the gap above, at and below the navel, usually while you lift your head. Ultrasound measures it more precisely and is used in research.
Here is the difficulty with diagnosis in this area, and it is worth stating plainly: the inter-recti distance is easy to measure, so it is what almost every study measures and what almost every commercial programme promises to change. Whether it is the thing that matters to how you feel and function is a separate question that the research has largely not answered. A number in centimetres is not a verdict on your abdomen.
How physiotherapy and rehabilitation help
The realistic aim is to restore what the abdominal wall and pelvic floor can do — generate tension, control the trunk, manage load during lifting and carrying — and to build confidence in using the body again. Narrowing the gap is a secondary and modest effect.
The most complete assessment of this comes from a 2023 systematic review and meta-analysis of 16 randomised trials involving 698 postnatal women. Every intervention included some form of abdominal exercise; some also used abdominal binding, kinesiotape or electrical stimulation. From six of those trials (161 women), there was moderate certainty evidence that abdominal exercise led to a small reduction in inter-recti distance compared with usual care: 0.43 cm (95% CI -0.82 to -0.05). [1]
The authors' own summary is worth quoting in substance: conservative interventions do not lead to clinically significant reductions in inter-recti distance, but abdominal exercises may have other physical and psychosocial benefits in the management of the condition. [1] That is an honest and useful conclusion, and it is the opposite of what most marketing in this area claims.
What a programme involves
| Component | What it is for | Evidence |
|---|---|---|
| Abdominal exercise including deep abdominal and curl-up based programmes |
Restoring the ability of the abdominal wall to generate and transmit tension, and rebuilding confidence in loading the trunk. | Small effect on the gap Reduction in inter-recti distance of 0.43 cm (95% CI -0.82 to -0.05), moderate certainty, judged not clinically significant [1]. May have other physical and psychosocial benefits [1] |
| Transversus abdominis training | Targeting the deep abdominal muscle that tensions the midline tissue. | Very low certainty Reduced inter-recti distance by 0.63 cm (95% CI -1.25 to -0.01) on very low quality evidence from two studies [2] |
| Pelvic floor muscle training | Bladder control, prolapse risk and pelvic floor function — not the width of the gap. | Supported, for other outcomes 37% lower odds of urinary incontinence (OR 0.63, 95% CI 0.41 to 0.97) and 56% lower odds of pelvic organ prolapse (OR 0.44, 95% CI 0.21 to 0.91), moderate certainty [3]. Not more effective than minimal intervention for the gap itself [2] |
| Education and reassurance | Understanding that the separation is a normal consequence of pregnancy that largely recovers, and that the gap is not the measure of your recovery. | Not separately tested Not isolated as an intervention in the cited reviews, but follows directly from what they found [1][2] |
| Abdominal binding, kinesiotape, electrical stimulation | Additional measures used alongside exercise in some trials. | No separate benefit shown Included among the interventions reviewed; the overall conclusion of no clinically significant reduction in inter-recti distance covers them [1] |
| Antenatal prevention programmes | Preventing or limiting the separation during pregnancy. | Never studied No trials evaluated interventions during the antenatal period [1] |
| Programmes promising to "close the gap" | Marketed on the premise that the separation can be substantially reversed. | Not supported Conservative interventions do not lead to clinically significant reductions in inter-recti distance [1]; very low quality evidence overall for recommending any specific programme [2] |
An amber badge means the sources cited on this page did not test that component, or found only a small or uncertain effect — not that it is useless. Note the one teal badge: pelvic floor training is well supported, but for bladder and prolapse outcomes rather than for the gap.
Why the gap is probably the wrong target
Almost every study in this field measures the inter-recti distance, because it can be measured reliably with a tape, fingers or ultrasound. Almost every commercial programme promises to reduce it. And the best evidence says that exercise reduces it by about four millimetres. [1]
There are two ways to read that. One is that exercise does not work. The other — which the reviewers themselves favour — is that the outcome being measured is not the outcome that matters. Their conclusion pairs "no clinically significant reduction in inter-recti distance" with "abdominal exercises may have other physical and psychosocial benefits". [1]
This matters practically. If your goal is a specific number of centimetres, the evidence says you will probably be disappointed, and you may spend a long time and a lot of money chasing it. If your goal is to lift your child without your back complaining, to return to running or the gym, to feel that your trunk is yours again, and to have a pelvic floor that works — those are goals the evidence supports working towards, and the pelvic floor component in particular has good evidence behind it. [3]
An earlier review reached the same conclusion from a different angle: there is currently very low-quality scientific evidence to recommend specific exercise programmes for treating this condition. [2] Where the evidence cannot distinguish between programmes, confident claims that one particular method works should be treated with suspicion.
What a course of treatment looks like
Assessment first, and it should cover more than the width of the gap: how the abdominal wall behaves under load, whether there is doming, what the pelvic floor can do, any bladder or bowel symptoms, back or pelvic pain, and what you actually want to get back to.
Then a graded programme of abdominal and pelvic floor work, progressed as you tolerate it, alongside practical advice about lifting, carrying and returning to exercise. The pelvic floor component deserves emphasis because it has the best evidence on this page — not for the gap, but for continence and prolapse, which affect quality of life considerably. [3]
Set expectations at the start. Substantial spontaneous recovery happens in the months after birth regardless of treatment. Exercise adds a small further reduction in the gap. [1] What a course of treatment is really for is function and confidence, and it should be judged on those.
And if the distress is mainly about appearance, that is worth naming rather than treating obliquely. It is a common and reasonable concern, but it is not one that four millimetres will resolve, and an honest conversation about it is more useful than a longer programme.
Two trials that answer the questions people actually ask
Are curl-ups dangerous? This is the most common worry, and it has been tested. A randomised trial of an exercise programme containing curl-ups in women with diastasis found it did not worsen the inter-recti distance (mean difference 1 mm at rest, 95% CI -1 to 4) and did not change the severity of pelvic floor disorders or low back, pelvic girdle or abdominal pain. It did improve rectus abdominis thickness (0.7 mm, 95% CI 0.1 to 1.3) and strength (9 Nm, 95% CI 3 to 16). [4]
So the exercise most often prohibited neither closed the gap nor widened it, and it made the muscle stronger. The prohibition is not supported.
Does training during pregnancy prevent it? A randomised trial of 12 weeks of abdominal and pelvic floor muscle training during pregnancy found a negligible effect on inter-recti distance both immediately after the intervention and at six weeks postpartum — effects of 2 mm above the umbilicus and -5 mm below, with confidence intervals crossing zero. [5] The distance increased in both groups during pregnancy and decreased afterwards regardless of training.
Both trials point the same way as the rest of this page: the gap is largely going to do what it does, and the useful targets are strength, function and the pelvic floor. Training during pregnancy remains worth doing — for continence and for the reasons set out under pelvic floor rehabilitation — just not as a way of preventing the separation.
The useful targets are strength and function rather than the width of the gap. A programme containing curl-ups improved abdominal strength without worsening the separation. [4]
What the evidence supports — and what it does not
Supported
- Pelvic floor muscle training for reducing urinary incontinence and pelvic organ prolapse after birth, on moderate certainty. [3]
- Abdominal exercise as part of postnatal recovery, for its physical and psychosocial benefits. [1]
- A small reduction in the gap from abdominal exercise — 0.43 cm, moderate certainty. [1]
- Reassurance that the separation is normal and largely recovers without treatment.
Not supported
- Programmes that promise to close the gap. No clinically significant reduction in inter-recti distance. [1]
- Any specific exercise programme over another. Very low-quality evidence overall. [2]
- Pelvic floor training as a treatment for the gap itself — no better than minimal intervention for that outcome. [2]
- Antenatal prevention programmes. No trials have tested them. [1]
- Treating the inter-recti distance as the measure of recovery.
- Binding, taping or electrical stimulation as ways to close the separation. [1]
How certain is this?
Evidence grade: Low to moderate.
The central estimate is reasonably well supported. It comes from a systematic review of 16 randomised trials with 698 women, and the specific meta-analysis behind the 0.43 cm figure was rated moderate certainty by GRADE. [1] But it drew on only six of those trials and 161 women, and just 3 of the 16 trials overall were at low risk of bias. [1] The direction and rough size of the effect are credible; precision is not.
The earlier review is weaker still and says so: seven randomised trials, 381 women, and its conclusions rated very low quality throughout, with several findings resting on single trials at high risk of bias. [2] Its overall verdict — that there is currently very low-quality evidence to recommend specific exercise programmes — is the most defensible summary of this field. [2]
The pelvic floor findings are the strongest here, drawn from 65 studies and 21,334 participants, with moderate certainty for both incontinence and prolapse. [3] Note two caveats even so: the prolapse estimate rests on a single randomised trial of 123 women, and heterogeneity for the incontinence outcome was high (I² 72%). [3] The same review found the evidence on exercise and diastasis recti specifically to be limited. [3]
The largest gap in the literature is prevention. Not one of the 16 trials evaluated any intervention during pregnancy. [1] Anyone offering an antenatal programme to prevent separation is working entirely beyond the evidence.
What to expect
Substantial narrowing in the first months after birth without doing anything in particular. Some residual separation in many women, permanently, which is common and usually not a problem.
From a programme, expect improvements in what you can do — lifting, carrying, returning to exercise — and in pelvic floor symptoms if those are present. Expect only a small change in the measured gap. [1]
Doming during effort often reduces as control improves, and is a more useful thing to watch than the width of the gap. If you have bladder leakage, urgency, or a sensation of heaviness or bulging, mention it: those symptoms have good evidence behind their treatment, [3] and they are frequently not volunteered.
Common questions
Can I close my gap with the right exercises?
Not by much, on current evidence. Abdominal exercise reduced the inter-recti distance by 0.43 cm compared with usual care, and the reviewers concluded that conservative interventions do not produce clinically significant reductions. [1] An earlier review found very low-quality evidence for recommending any specific programme. [2] Exercise is still worth doing — for function, for the pelvic floor and for how you feel — but "closing the gap" is not what it reliably delivers.
Is my abdomen damaged?
No. The linea alba stretched under a growing uterus, which is what it is built to do. Nothing has torn. Most of the separation recovers over the months after birth, and residual separation is common and frequently symptom-free.
Are sit-ups dangerous for me?
The evidence does not support a blanket prohibition. Curl-up exercises were part of the interventions studied, and the evidence about them is very low quality rather than negative. [2] A more useful guide than a banned-exercise list is how your abdomen behaves: if a movement causes marked doming you cannot control, it is too much for now and should be regressed and rebuilt.
Should I be doing pelvic floor exercises too?
Yes, and this is the best-supported recommendation on the page — though not for the reason you might expect. Pelvic floor muscle training reduced the odds of urinary incontinence by 37% and pelvic organ prolapse by 56%, on moderate certainty. [3] For the width of the separation itself, it was no better than minimal intervention. [2] Do it for your bladder and pelvic floor, not to close the gap.
Would a binder or abdominal support help?
Not for the separation. Abdominal binding, kinesiotape and electrical stimulation were among the interventions reviewed, and the overall finding of no clinically significant reduction in inter-recti distance applies to them. [1] Some women find a support comfortable in the early weeks, which is a reasonable use of it — just not a corrective one.
Can I prevent it in my next pregnancy?
Nobody knows. Of the 16 trials in the most recent review, none evaluated any intervention during pregnancy. [1] That is a genuine blank in the literature, so any programme sold as antenatal prevention is going well beyond the evidence.
Will I need surgery?
Surgical repair exists and is sometimes considered where there are significant functional problems, but it was not evaluated in any of the reviews cited here, so this page makes no claim about it either way. It is a conversation for a surgeon, and a reasonable one to have only after a proper course of rehabilitation.
Where does back pain fit in?
It may be related and it may not. The reviews cited here measured the gap, not back pain, so this page cannot claim that closing a separation resolves back symptoms. If back pain is your main problem, it is worth addressing in its own right — see low back pain — alongside pelvic floor rehabilitation.
References
- 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 Jun;119:54–71. doi:10.1016/j.physio.2023.02.002 PMID 36934466 Systematic review and meta-analysis
- Gluppe S, Engh ME, Bø K. What is the evidence for abdominal and pelvic floor muscle training to treat diastasis recti abdominis postpartum? A systematic review with meta-analysis. Brazilian Journal of Physical Therapy. 2021 Nov–Dec;25(6):664–675. doi:10.1016/j.bjpt.2021.06.006 PMID 34391661 Systematic review and meta-analysis
- Beamish NF, Davenport MH, Ali MU, et al. Impact of postpartum exercise on pelvic floor disorders and diastasis recti abdominis: a systematic review and meta-analysis. British Journal of Sports Medicine. 2025 Mar 31;59(8):562–575. doi:10.1136/bjsports-2024-108619 PMID 39694630 Systematic review and meta-analysis
- Gluppe SB, 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 Jul;69(3):160–167. doi:10.1016/j.jphys.2023.05.017 PMID 37286390 Randomised controlled trial
- Theodorsen NM, Bø K, Fersum KV, et al. Pregnant women may exercise both abdominal and pelvic floor muscles during pregnancy without increasing the diastasis recti abdominis: a randomised trial. Journal of Physiotherapy. 2024 Apr;70(2):142–148. doi:10.1016/j.jphys.2024.02.002 PMID 38472049 Randomised controlled trial
About this guide
If you need assessment
This page explains. It does not diagnose.
Bladder leakage, a sensation of heaviness or bulging, or pain that limits caring for your baby all deserve assessment rather than a self-directed programme. Physiotherapist India publishes information and takes no bookings. Ask a qualified physiotherapist to examine your own case before acting on anything written here.