In brief. Diastasis recti after childbirth is a separation of the rectus abdominis muscles wider than 2 fingers along the linea alba. Around 60% of women have a functional diastasis by week 36 of pregnancy; in most cases it closes in the first 8-12 weeks postpartum. Self-test: lying on your back with knees bent, lift your head, fingers across the linea alba above and below the navel. What works: diaphragmatic breathing 5 minutes x 2 times a day, transverse abdominis activation through an exhale with “ffff”, glute bridge, cat-cow, side plank on the knee. What makes diastasis worse: crunches and sit-ups, classic plank with sagging, “boat” pose, wearing a binder constantly (muscles weaken further), waiting six months to a year without any work. Timelines: with the right programme, functional diastasis closes in 2-4 months. If the separation is wider than 4 fingers or there is a bulge near the navel, a surgeon or pelvic floor physio should be involved, and the trainer comes in afterwards.
Diastasis recti is one of the most discussed topics among postpartum mothers. And one of the most surrounded by myths. Some believe it is permanent and only surgery helps. Others think a few “ab workouts” will close it. The truth, as usual, is in the middle: diastasis can and should be addressed with exercise – but not with any exercise. Some movements genuinely help; others make things worse.
Around 60% of women have a functional diastasis by week 36 of pregnancy; in most cases it closes in 2-4 months of consistent work with diaphragmatic breathing and transverse abdominis activation, without crunches.
In this article, we will look at what diastasis is, how to check it yourself, which exercises work, which are off-limits, and when it is time to see a doctor. I draw on current clinical guidelines and systematic reviews.
Contents
- What diastasis is
- Degrees of separation
- How to self-test at home
- What not to do
- Daily-life mistakes – not just exercises
- What helps: 8 core exercises
- Recovery timelines
- C-section and diastasis
- Binder and taping
- Nutrition and tissue support
- When to see a doctor
- What to do right now
What diastasis is and why it happens
Diastasis is a separation of the rectus abdominis muscles along the linea alba. The linea alba is connective tissue that runs along the centre of the belly from the sternum to the pubic bone and links the right and left halves of the rectus abdominis.
During pregnancy, the growing uterus presses on the abdominal wall, and the hormone relaxin softens connective tissue, making it more elastic. This is a natural process that allows the belly to stretch and accommodate the baby. But after childbirth, the linea alba does not always return to its previous state – and the muscles stay apart.
By the numbers, diastasis of some degree is present in most women right after childbirth. In many cases it closes on its own within the first 8-12 weeks. But in a significant share – 30 to 60 percent – it persists past six months without targeted recovery work.
Risk factors: large baby, multiple pregnancy, repeat pregnancies, weak core before pregnancy, excessive abdominal load in the third trimester, and the genetics of connective tissue.
Degrees of separation
In clinical practice, diastasis is classified by the width of the gap between the rectus muscles:
- Grade 1 (normal / mild): up to 1 finger. Often closes on its own in the first 2-3 months postpartum with sensible activity.
- Grade 2 (moderate): 1-2 fingers. Responds to conservative correction: breathing, transverse abdominis, gentle strength. Recovery 3-6 months.
- Grade 3 (significant): more than 2 fingers. Requires an individual programme with a specialist, sometimes a surgical consult. Timeline 6-12 months or longer.
In addition to width, depth matters: the fingers can “sink” into the abdominal cavity at different depths. A deep diastasis with thin connective tissue is more serious than a separation of the same width with a dense linea alba. A specialist assesses this during an examination.
Location also matters: above the navel, at navel level, below the navel. Most often the separation is widest at navel level – this is where the maximum pressure during pregnancy is directed.
How to check diastasis yourself
There is a simple home test. It does not replace a specialist check, but it gives a general picture.
Steps:
- Lie on your back, knees bent, feet on the floor.
- Place the fingers of one hand horizontally on the belly, just above the navel, pads down.
- Slowly lift your head and shoulders off the floor – as if starting a crunch, but without a full lift.
- Feel how many fingers fit into the gap between the muscles. Check at three points: above the navel, at the navel, below the navel.
What the results mean:
- Less than 1 finger – normal.
- 1-2 fingers – functional diastasis, responds to exercise.
- More than 2 fingers – needs an individual programme, sometimes a surgical consult.
Besides width, pay attention to depth: if your fingers “sink” deeply, this suggests weak connective tissue and requires a more cautious approach.
Important: this test is informative no earlier than 6-8 weeks postpartum. Before that, the body is still in early recovery, and the results will be inaccurate.
Another test – for doming. Lie on your back, knees bent, feet on the floor. Slowly lift your head and look at the belly. If a “dome”, ridge, or bulge appears down the centre from sternum to navel – this is diastasis with deep-muscle dysfunction. If the belly stays flat or softly draws in – your activation is working correctly.
What not to do with diastasis
If diastasis is present, the following movements can widen the separation or slow recovery.
Classic crunches and sit-ups
This is the most common mistake. Crunches create strong pressure on the linea alba and literally push the muscles outward. If you see a “ridge” or “dome” on the belly during a crunch, this is a clear sign the exercise is not for you right now.
Classic plank on straight arms or elbows
A full plank creates significant intra-abdominal pressure. If the deep muscles are not yet ready to hold this pressure, the load goes onto the linea alba, stretching it. You can return to the plank later, once the inner corset has rebuilt, but not in the early stages.
Straight-leg raises lying on the back
A straight-leg raise is one of the most loading exercises for the linea alba. It requires strong rectus abdominis engagement and creates pressure that, in the presence of diastasis, can be harmful.
Heavy strength work with axial load
Barbell back squats, heavy deadlifts – anything that creates significant intra-abdominal pressure – is off-limits in the early stages of recovery. You can return to strength work, but gradually, once the deep muscles begin to function correctly.
High-intensity cardio and jumping
Running on asphalt, jumping, impact load – all of this multiplies intra-abdominal pressure. Until pelvic floor and deep-core function have recovered, this is best postponed. More on this in when you can run after childbirth.
Full quadruped bridge with arch
A “bridge” pose with straight arms and a low-back arch stretches the linea alba further. Replace it with a supine glute bridge.
Daily-life mistakes – not just exercise
Often diastasis does not close even with correct training, because during the day a woman repeats movements that push it apart. These daily patterns matter more than three sessions a week.
Lifting the baby off the floor with straight legs and a forward bend. This creates maximum pressure on the linea alba. The correct way: squat down to the baby, activate the deep muscles on the exhale, lift while keeping the baby close to your body.
Sitting up suddenly from lying down. When you want to get out of bed, do not “crunch” – roll onto your side, push up with your hand, and stand up via the side. This rule is especially important in the first 6 months postpartum.
Straining on the toilet, when coughing, when sneezing. Chronic straining is one of the main causes of worsening diastasis. If you tend toward constipation, see a doctor. When coughing and sneezing, learn to exhale while engaging the transverse abdominis.
Constantly carrying the baby on one hip. This creates asymmetric tension and can widen the separation. Alternate sides, use a sling or ergonomic carrier with proper support.
Heavy bags. If you have to carry something heavy (groceries, the baby in a car seat), distribute the weight symmetrically and lift on an exhale with a drawn-in belly.
Sleeping on the stomach. In the first months postpartum, sleeping on the stomach can increase pressure on the linea alba. Better to sleep on your back or side.
What helps: 8 core exercises
Recovery from diastasis is built on strengthening the deep core muscles – primarily the transverse abdominis and the pelvic floor. This is not about “carving abs”, but about rebuilding the inner corset that supports the linea alba and helps it draw in. In parallel, work on the pelvic floor – it pairs with the diaphragm and transverse abdominis, and without it the deep corset does not close.
1. Diaphragmatic breathing
The basic exercise that every recovery programme starts with. On the inhale, the belly softly expands and the ribs widen to the sides. On the exhale – a gentle drawing in of the belly toward the spine, activating the transverse abdominis. No straining – the work is subtle and intentional.
This exercise can be done lying down, sitting, or standing. It teaches you to engage the deep muscles without extra pressure on the linea alba. 5 minutes in the morning and 5 in the evening every day – the foundation that covers 30-40% of diastasis work.
2. Transverse abdominis activation
Lying on your back with knees bent, on the exhale gently draw in the lower belly – as if zipping up tight jeans from pubic bone upward. Hold for 5-8 seconds, continuing to breathe. Repeat 10-15 times.
Key point: it is the deep muscle that should work, not the outer abs. If the belly bulges or domes during the movement, the technique is off.
3. Side plank on the knee
Unlike a classic plank, a side plank on the knee does not create direct pressure on the linea alba. It strengthens the obliques and core stabilisers, which helps keep the rectus muscles in position.
Start by holding for 10-15 seconds and gradually increase the time. If you feel discomfort, reduce the load.
4. Cat-cow (marjariasana)
On all fours, on the inhale arch the back downward (cow), on the exhale round the back upward (cat), gently drawing in the belly at the same time. This mobilises the spine and teaches you to coordinate breathing with core activation.
5. Glute bridge
Lying on your back, on the exhale lift the pelvis, engaging the glutes and pelvic floor. At the top – a 2-3 second pause with a soft drawing in of the belly. Slow lowering.
This strengthens the posterior chain, which is often weak postpartum, and indirectly supports core stability.
6. “Dead bug” (adapted)
Lying on your back, knees bent at 90 degrees, arms reaching up. On the exhale, gently lower the opposite arm and leg, engaging the transverse abdominis. Return on the inhale. 8 reps each side.
Important: the lower back is pressed into the floor, the belly does not bulge. If a dome appears, reduce the range to what you can control.
7. Wall squats
Standing with your back against the wall, slowly slide down to about 90 degrees at the knees, back sliding along the wall. On the exhale, come up while gently drawing in the belly.
A safe strength exercise that teaches the correct activation pattern without overloading the linea alba.
8. Bird-dog
On all fours, slowly extend the opposite arm and leg while keeping the torso steady. On the exhale, draw in the belly; on the inhale, relax. 8 reps each side.
Teaches core stability without pressure on the spine. Safe with diastasis and during pregnancy.
Full programme with all the exercises. All movements that are safe with diastasis are gathered in a recovery programme (3-12 months) with a weekly plan, illustrations, and stop signals. Free PDF on the page.
Recovery timelines: what to expect
Realistic expectations matter. Diastasis does not close in a week or even a month. Here are rough guidelines:
- First 2-4 weeks – learning the breathing, activating deep muscles, building the habit. Visible change may not yet appear, but internal work is already happening.
- 1-3 months – with consistent practice 2-3 times a week, the separation usually starts to noticeably reduce. Tissues tighten, muscles engage.
- 3-6 months – significant improvement for most women. The gap narrows, the belly draws in, the “empty centre” feeling fades.
- 6-12 months – full or near-full recovery with diastasis up to three fingers. With a wider separation, the process may take longer.
These timelines are a guide, not a guarantee. The speed of recovery depends on starting state, consistency, genetics, and overall lifestyle.
Sleep, nutrition, sleep, sleep again. Chronic sleep deprivation slows recovery of any tissue, including the linea alba. If the choice is between one more session and an hour of sleep – choose sleep.
C-section and diastasis
After a C-section, the approach to diastasis differs slightly. The scar on the uterus heals internally over 6-8 weeks, and before that no abdominal work is allowed – not even gentle work.
First 6-8 weeks: only side-lying breathing, walking, gentle Kegel practice. No torso lifts, no transverse activation through contraction.
8-12 weeks: after a doctor’s check and confirmation that the scar is sound, begin breathing with transverse abdominis activation. Very gently.
12 weeks and beyond: gradual expansion of the programme along the same logic as after vaginal birth, but at a more cautious pace. Crunches and a classic plank – not before 4-6 months.
More on this in training after a C-section.
A C-section often also creates adhesions around the scar, which can pull on the abdominal wall and indirectly worsen symptoms. Gentle scar massage (with a doctor’s permission) helps mobilisation.
Binder and taping
Binder. In the first 1-2 weeks postpartum, a postpartum belly binder can help as temporary support – especially if there is low-back pain or a feeling of “emptiness” in the centre of the belly. Wearing it for longer than 2-3 weeks is not recommended – your own muscles stop working and recovery slows.
After a C-section, a binder is worn longer – usually 4-6 weeks, per the doctor’s advice. It protects the scar and reduces discomfort during movement.
Taping for diastasis. Tape is supportive help, not a way to close the gap. Kinesiology tape gives the skin light tactile feedback: it does not pull the muscles together, but it helps you remember to gently draw in the belly through the day and takes some load off the linea alba. Diastasis itself is closed by the work of the transverse abdominis, not by tape.
In my sessions I tape clients, and many say it feels easier both during the workout and in daily life: less of a dragging sensation low in the belly and lower back, and the core stays steadier. The tape is worn for several days, then removed. This is subjective relief – the evidence base for kinesiology taping is still limited, so we treat it as a pleasant add-on, not a treatment.
The full breakdown – what tape actually does, who it suits and who should apply it – is in a separate breakdown: Taping during pregnancy.
Tape is applied by a specialist – a trainer trained in taping, a physiotherapist, or a rehabilitation therapist – individually for your belly and degree of separation. “Stick it on yourself from a picture” schemes from the internet are not suitable for diastasis: the wrong tension or direction is at best useless and at worst pulls tissue the wrong way. A specialist shows you the first time; after that you can repeat it under their guidance.
When tape is appropriate: with significant diastasis in the first weeks as daily-life support and for a dragging feeling in the lower back. When it is useless: as a replacement for training, or for “slimming” and “tightening” the belly – tape does neither.
What does not work: compression underwear. Shapewear and corsets do not close diastasis. They create the appearance of a flat belly but do not stimulate deep-muscle work.
Nutrition and tissue support
Connective tissue needs building materials for recovery:
- Protein – 1.2-1.6 g per kg of body weight per day. During breastfeeding – the upper end. This is the base for collagen synthesis.
- Vitamin C – without it, collagen is not built. Citrus, peppers, greens, berries.
- Zinc, copper, silicon – trace minerals important for connective tissue. Nuts, whole grains, seafood.
- Omega-3 – anti-inflammatory, tissue support. Oily fish twice a week or a supplement, with your doctor’s input.
- Hydration – 2-2.5 litres of water per day, more during breastfeeding. Dehydrated tissue recovers poorly.
A calorie deficit below 300-400 kcal a day during breastfeeding is off-limits. The body cannot simultaneously sustain lactation and rebuild connective tissue. Maintenance nutrition plus regular activity works better than fast weight loss.
When to see a doctor
Exercise helps in most cases, but there are situations where medical attention is needed:
- Diastasis wider than 4-5 fingers that does not narrow after 3-6 months of consistent work
- Hernia of the linea alba – a bulge that increases with straining. This is not diastasis, it is a separate condition that needs surgical evaluation
- Severe pain in the belly or lower back
- Nausea, vomiting, bowel disturbance alongside a bulge
- No progress after 6 months of correct training
In such cases, a surgical consult may be needed. But surgery is a last resort, used only when conservative methods do not work. Options include abdominoplasty and endoscopic repair – the surgeon will recommend the most suitable approach individually.
More on postpartum recovery – in the after-childbirth section and the overview article on postpartum recovery. If you had a C-section, also read training after a C-section and when you are ready for load. A complete programme with exercises and illustrations is on the recovery phase 3-12 months page.
What to do right now
If you suspect diastasis – do not panic. It is a common condition and it can be corrected. But it is important not to start doing random internet exercises without checking your diastasis and making sure your technique is correct. Incorrect technique is the main reason diastasis does not reduce or gets worse.
Today’s checklist:
- Do the home diastasis test (see above). Write down the result – this is your baseline.
- Start with 5 minutes of diaphragmatic breathing in the morning and evening. This is already work.
- Review your daily-life patterns – how you lift the baby, how you get out of bed.
- If you see a dome with any activation – do not load the abs until you have a consultation.
Book an intro session – we will check whether diastasis is present and how wide it is, assess muscle function, and build a specific recovery programme. Intro session – from 1,400 rubles (online across Russia and worldwide).
Book an intro session – we will check your diastasis
This topic is also covered in my blog on T-Zh (in Russian): How to close diastasis after birth: an 8-week training plan.
