Diastasis Recti (DRA): Symptoms, Causes and Treatment
Quick Answer: Diastasis recti abdominis is a widening of the gap between the two halves of the rectus abdominis, most often after pregnancy. It is common rather than abnormal, affecting roughly 60% of women at six weeks postpartum and 30% at one year. Progressive core and whole-body loading is the main treatment.
A visible ridge down the midline of the abdomen during a sit-up worries a lot of people in 2026, and much of what circulates online about it is alarming without being accurate. Diastasis recti abdominis is common, measurable, and in most cases responsive to loading.
This guide covers how it is defined, how often it persists, what the current trial evidence shows about exercise, and how to think about returning to training. It is written for general musculoskeletal and return-to-exercise questions rather than clinical postnatal management.
What is diastasis recti abdominis?
Diastasis recti abdominis is an increase in the inter-recti distance — the gap between the left and right halves of the rectus abdominis, where the linea alba runs. It is identified by measuring that distance at set points on the abdomen, usually with ultrasound or calipers. It is a measurement, not a tear.
The thresholds most commonly cited in the research, and reproduced in a 2025 network meta-analysis in Scientific Reports, are:
|
Measurement point |
Inter-recti distance considered diastasis |
|
3 cm above the umbilicus |
2.2 cm or more |
|
At the umbilicus |
2.7 cm or more |
|
3 cm below the umbilicus |
1.0 cm or more |
The same review reports prevalence of almost 70% in the late third trimester, 60% at six weeks after childbirth, and 30% at one year. Read plainly, that means the majority of women have it at some point and most see it narrow substantially without any intervention. A measurement above the threshold is a finding, not a diagnosis of dysfunction on its own.
At Elevate Physiotherapy in Singapore, what matters more than the number is whether the abdominal wall can generate and transfer force during the tasks a person actually needs to do. Two people with the same gap can present completely differently.
What causes diastasis recti to persist?
The gap widens under the sustained mechanical stretch of pregnancy and narrows as that load is removed, but it does not close completely in everyone. A 2024 Scientific Reports study of 1,000 postpartum women, measured by ultrasound, tracked how often it persists years later. Higher body mass index, more births, twin pregnancy and diabetes were the risk factors identified.
|
Time since childbirth |
Inter-recti distance over 2 cm |
Inter-recti distance over 3 cm |
|
3 years |
36% |
13% |
|
5 years |
31% |
8% |
|
10 years |
22% |
6% |
|
20 years |
26% |
8% |
|
30 years |
30% |
10% |
Two things stand out in that pattern. A meaningful minority still measure above threshold decades later, so time alone does not resolve it for everyone. Equally, the figures do not climb steadily with age, so the common fear that an untreated gap inevitably worsens is not supported by this data.
For non-pregnancy-related cases seen at our Singapore clinics, the drivers are usually the same in principle: sustained intra-abdominal pressure against an abdominal wall that has not been loaded enough to tolerate it. Rapid weight change and heavy lifting with poor pressure management are the common examples.
Does exercise actually close the gap?
Exercise does narrow the gap, and the effect is larger when active training is combined with another modality rather than used passively. The strongest current evidence is a 2025 network meta-analysis in Scientific Reports covering 27 randomised trials, 1,340 postpartum women and 39 separate interventions, with modest heterogeneity at I² 26.8%.
|
Intervention |
Reduction in inter-recti distance |
Ranking probability (SUCRA) |
|
Combined core and muscle energy training plus kinesio taping |
−26.25 mm (95% CI −29.41 to −23.09) |
0.96 |
|
Neuromuscular electrical stimulation plus core training |
−22.62 mm (95% CI −26.58 to −18.67) |
0.88 |
|
Abdominal binder alone |
−10.32 mm (95% CI −13.81 to −6.83) |
0.52 |
|
Kinesio taping alone |
−3.93 mm (95% CI −6.20 to −1.65) |
0.18 |
For context, the minimal clinically important difference for inter-recti distance is 5 to 10 mm. Kinesio taping on its own falls below that band, which is why passive approaches used alone are hard to justify. The review authors graded the certainty of evidence from low to high and cautioned that clinical interpretation should remain cautious.
A separate 2026 systematic review in Hernia, covering 9 randomised trials and 450 participants, found a pooled reduction of 8.05 mm (95% CI −10.43 to −5.68) with no difference between training types. Notably, it found no superior functional recovery on the Oswestry Disability Index. Narrowing the gap and improving how someone functions are not the same outcome.
Elevate Physiotherapy in Singapore treats that distinction as the whole point. The measurement is a useful marker to track, but the goal is force transfer through the trunk during lifting, carrying and training.
How should you return to exercise with diastasis recti?
Return to exercise by rebuilding the abdominal wall’s tolerance to pressure and load, not by avoiding abdominal work altogether. Progression is guided by whether you can control the midline under a given load, rather than by a fixed list of banned movements. Doming or a visible ridge during an exercise is a signal to regress that exercise, not to stop training.
“Many people think pain means they should stop moving and rest completely. In most musculoskeletal cases the opposite is true — the right graded movement, loaded correctly, is what actually restores the tissue. Rest has a place early on, but recovery is built on progressive loading, not avoidance.”
— Winsen Citra, Principal Physiotherapist, Elevate Physiotherapy
A workable sequence looks like this:
- Establish pressure control — breathe out through the effort of a movement and keep the midline flat, before adding any external load.
- Load isometrically — dead bug and modified plank variations held for time, progressing only while the midline stays controlled.
- Add anti-rotation and carry work — Pallof press, suitcase carry and farmer’s walk, which train trunk stiffness in the positions daily life demands.
- Reintroduce flexion gradually — curl-up variations reintroduced late and progressed by tolerance, since avoiding them permanently is neither necessary nor supported.
- Re-measure objectively — track inter-recti distance alongside a functional test such as a loaded carry distance, rather than judging progress by appearance.
Elevate Physiotherapy runs assessments at Kovan and Jalan Besar, and home physiotherapy is available for anyone unable to travel in the early months. No doctor’s referral is needed. Anyone with pelvic floor symptoms, ongoing bleeding, a caesarean wound concern or pain that has not been medically reviewed should see a doctor or a women’s health physiotherapist first.
Frequently asked questions
Does diastasis recti go away on its own after pregnancy?
In most women it narrows substantially without any intervention. The 2025 network meta-analysis in Scientific Reports records prevalence falling from almost 70% in the late third trimester to 60% at six weeks after childbirth and 30% at one year, which is a large natural reduction over twelve months.
A longer-term picture comes from a 2024 study of 1,000 postpartum women, in which 36% still measured over 2 cm at three years and 30% at thirty years. So it resolves for many but not all, and the residual group stays fairly stable rather than deteriorating. If the gap is still bothering you functionally after several months, an assessment in Singapore is a reasonable next step.
Which exercises should I avoid with diastasis recti?
Fewer than the internet suggests, and the decision should be made by watching your own response rather than by following a blanket list. The practical rule is that any movement producing visible doming or a ridge along the midline is currently too demanding and should be regressed, not permanently abandoned.
Crunches and full sit-ups are commonly restricted early on for that reason, but they are reintroduced later in most programmes once pressure control is established. Heavy lifting with breath-holding is worth modifying while you rebuild tolerance. The 2026 Hernia review found no difference in outcome between training types, which supports choosing exercises by tolerance rather than by category.
Can diastasis recti be treated without surgery in Singapore?
Yes, conservative treatment is the first-line approach and the trial evidence supports it. The 2025 network meta-analysis found combined core and muscle energy training with kinesio taping reduced inter-recti distance by 26.25 mm and neuromuscular electrical stimulation with core training by 22.62 mm, both far above the 5 to 10 mm considered clinically important.
Passive approaches used alone performed poorly, with kinesio taping on its own producing only 3.93 mm. Surgical repair is generally reserved for cases with a hernia or persistent symptoms after a genuine trial of loading. Elevate Physiotherapy in Singapore works within the conservative pathway and refers on where a surgical opinion is warranted.
How is diastasis recti measured, and do I need a scan?
It is measured as the inter-recti distance at set points on the abdomen, most accurately by ultrasound but reliably enough by calipers or finger-width in a clinical setting. The thresholds cited in the 2025 review are 2.2 cm at 3 cm above the umbilicus, 2.7 cm at the umbilicus and 1.0 cm at 3 cm below it.
A scan is not usually necessary to begin treatment, because the number on its own does not determine the plan. What changes the plan is how the abdominal wall behaves under load, which is assessed by watching you move. Imaging becomes more relevant if a hernia is suspected, and that is a medical referral rather than a physiotherapy one.
Do abdominal binders or kinesio tape help diastasis recti?
They help modestly, and only as an addition to active training rather than a replacement for it. In the 2025 network meta-analysis, abdominal binders used alone reduced inter-recti distance by 10.32 mm with a ranking probability of 0.52, while kinesio taping alone managed 3.93 mm with a ranking probability of 0.18.
The taping figure sits below the 5 to 10 mm minimal clinically important difference, so on its own it is unlikely to matter to a patient. The same tape combined with core and muscle energy training was the highest-ranked intervention in the network, which is the more useful reading. A binder can be helpful for short-term comfort in the early weeks, and Elevate Physiotherapy in Singapore would pair it with a loading programme rather than use it alone.
Getting an objective read on your abdominal wall
Diastasis recti is common, measurable and usually responsive to progressive loading. The gap matters far less than what your trunk can do under load. If a ridge, a weak core or discomfort with lifting is holding back your return to training, book an assessment with Elevate Physiotherapy at Kovan or Jalan Besar on +65 8814 3822.
This article is for informational purposes only. Please consult a qualified healthcare professional. Individual results vary and no treatment outcome is guaranteed.
Written by
Winsen Citra
Principal Physiotherapist
Winsen is the Principal Physiotherapist at Elevate Physiotherapy, Singapore. A University of Melbourne physiotherapy graduate and former Singapore General Hospital physiotherapist, he specialises in sports and musculoskeletal rehabilitation and works with athletes and active individuals to recover from injury and return to full performance.