Closed the gap, or just closer? Here's how to tell.
Most mums are told to watch for the gap shrinking — but a healed core is about tension and function, not a number. Here's how to check at home.
Quick answer
Your diastasis recti is considered functionally healed when you can generate tension across the midline of your belly and your abdominal wall no longer domes, bulges or cones under load — not simply when the gap measures zero. Many women's health physiotherapists now judge recovery by how well the connective tissue (linea alba) transfers load, rather than by finger-width alone. A small residual gap of around one to two finger-widths can be perfectly normal and strong. The clearest at-home signs are: no visible doming when you sit up, a firm springy feeling under your fingers when you engage your core, and everyday movements (lifting your baby, coughing, rolling out of bed) that feel supported rather than weak. Results vary from mum to mum, so a women's health physio is the best person to confirm.
If you've been rebuilding your core for a few months, you've probably found yourself lying on the bathroom floor, fingers pressed into your belly, wondering: is this actually better, or am I imagining it? It's one of the most common questions new mums ask — and the honest answer is that "healed" doesn't mean what most of us assume it means.
The old idea was simple: measure the gap between your abdominal muscles, and when it closes to zero, you're done. Modern physiotherapy has moved on. What matters far more is whether that midline can hold tension and do its job — supporting your spine, your posture and every time you lift your little one. Let's walk through what a healed core really looks like, and how to check yours safely at home.
What "healed" actually means
Diastasis recti is the widening and thinning of the linea alba — the band of connective tissue that runs down the centre of your abdomen, joining the two sides of your "six-pack" muscles. During pregnancy this tissue stretches to make room for your growing baby, which is completely normal. According to Sperstad and colleagues (British Journal of Sports Medicine, 2016), around 60% of women still have a measurable separation at 6 weeks postpartum, 45.5% at 6 months, and 32.6% at 12 months — so a slow, gradual improvement over the first year is the norm, not the exception.
of mums still have diastasis recti at 6 weeks postpartum (Sperstad et al., BJSM, 2016)
still have a measurable gap at 12 months postpartum (Sperstad et al., BJSM, 2016)
a residual gap of roughly one to two finger-widths is often considered within a normal, functional range
Here's the shift worth understanding: a gap that stays slightly open can still be strong. When physiotherapists assess recovery today, many focus on load transfer — whether the linea alba becomes taut and springy when you engage your deep core, so that force moves cleanly across your midline. A belly that generates tension and stays flat under effort is doing its job, even with a small gap. A belly that domes into a ridge or sinks into a valley when you lift your head is telling you the tissue isn't yet managing pressure well.
The signs your diastasis recti is healing well
You don't need a clinic to notice progress. These are the everyday markers women's health physios look for — and the ones you can watch for yourself over the weeks.
| Sign of a healing core | Sign there's still work to do |
|---|---|
| The midline feels firm and springy under your fingers when you engage | The midline feels soft, hollow or "gives way" easily under pressure |
| No visible doming or coning ridge when you sit up or strain | A ridge or dome pops up down the centre of your belly on effort |
| Lifting your baby, coughing and rolling out of bed feel supported | Everyday movements feel weak, unstable or make your belly bulge |
| The gap has narrowed and, more importantly, feels shallower | The gap still feels deep, with little tension across it |
| Less lower-back ache and a flatter lower belly as your core reconnects | Ongoing back ache, a persistent lower-belly pooch or a feeling of "disconnection" |
Notice that only one of those rows is about the gap's width. The rest are about function — how your core behaves. That's deliberate. If you'd like a refresher on measuring in the first place, our diastasis recti self-check guide walks through the two-finger test step by step.
How to check at home: the tension test
This gentle self-check builds on the classic finger-width test but adds the part that actually matters — whether you can create tension across the gap.
Step 1: Get into position
Lie on your back, knees bent, feet flat on the floor. Rest the fingers of one hand flat, palm facing you, just above your belly button, running down the midline.
Step 2: Feel the resting gap
With your head relaxed down, gently press your fingertips in. Notice how many finger-widths of space you feel between the two bands of muscle, and how deep it feels.
Step 3: Add gentle tension
Take a slow breath out, gently draw your lower belly in and up (as if hugging your baby closer with your tummy), then lift your head just slightly. Feel what happens under your fingers. A healing core will create a firm, springy "trampoline" you can feel pushing back. If your fingers still sink into a soft gap with no resistance, the tissue needs more time and targeted work.
Step 4: Watch for doming
Look down at your belly as you lift your head. A smooth, flat abdomen is a good sign. A raised ridge or a sunken channel down the middle means the pressure isn't being managed yet — ease off and keep building your deep-core foundation. Our guide on why crunches can make diastasis worse explains why that doming matters.
The honest takeaway
A gap of one to two finger-widths that feels firm and holds tension is a genuinely good outcome — many strong, active mums live comfortably with exactly that. Chasing a zero-gap number can push women toward the wrong exercises. Aim for a core that works: flat under load, supportive in daily life, and free of that bulging ridge. Progress is rarely a straight line, and every mum's timeline is different.
When to see a women's health physio
Self-checks are useful, but they're not a diagnosis. It's worth booking a women's health physiotherapist if you notice any of the following, whatever your gap measures:
- A visible dome or bulge that won't settle after several months of gentle core work
- Ongoing lower-back or pelvic pain, or a feeling that your core simply won't switch on
- Leaking, heaviness or pressure in the pelvic floor (these often travel with diastasis recti)
- A gap wider than around two to three finger-widths that isn't improving over time
The UK's NHS notes that abdominal separation usually improves in the weeks and months after birth, and advises seeing your GP, midwife or a physiotherapist if the gap doesn't seem to be closing or you have pain. A qualified physio can assess load transfer directly and tailor a plan to your body — something no online article can replace.
What actually helps it heal
The tissue heals fastest when you give it the right stimulus: gentle, progressive deep-core work that trains tension across the midline, rather than crunches or planks that pile on pressure too soon. That usually means starting with breath-led deep-core engagement, then layering in supported movements over weeks. If you're not sure where to begin — or you've been guessing — a structured plan takes the pressure off you to piece it together.
Rebuild with a plan made for exactly this
Mumma Glow's Core Reconnect program is the affordable, one-time option — a step-by-step at-home guide to reconnecting your deep core and closing the tension gap, with no subscription and no gym. It's the budget-friendly alternative to programs like MUTU, designed for busy mums fitting recovery around a newborn. Use code GLOW20 for 20% off your one-time purchase.
Whichever route you take, remember the goal isn't a number on your fingers — it's a core that holds you up through everything motherhood asks of it. For a realistic sense of how long that takes, our diastasis recti healing timeline is a reassuring read, and if you're years past birth, it's rarely too late to make progress.
Frequently asked questions
Can diastasis recti fully close on its own?
For many mums the gap narrows significantly on its own in the first few months, as the research from Sperstad et al. (BJSM, 2016) shows. Whether it fully closes varies from mum to mum — and even when a small gap remains, targeted deep-core work can restore strong, functional tension across the midline. The NHS advises seeing your GP or a physiotherapist if it doesn't seem to be improving.
Is a two-finger gap considered healed?
A residual gap of roughly one to two finger-widths is often within a normal, functional range — especially if the tissue feels firm and springy and there's no doming under load. Physiotherapists increasingly judge recovery by how well the midline transfers force, not by reaching zero. If yours feels soft and deep, it likely needs more time and work.
How long does diastasis recti take to heal?
It varies widely. Many mums see steady improvement across the first 6 to 12 months, and consistent deep-core work can continue to help beyond that. There's no single deadline — our realistic timeline guide breaks down what to expect stage by stage.
Why does my belly still dome even though the gap is smaller?
Doming means your abdominal wall isn't yet managing pressure well, so force pushes outward through the midline instead of being contained. It's a signal to ease off exercises like crunches and sit-ups and focus on breath-led deep-core tension first. Our guide on which workouts help and which make it worse explains more.
Do I need surgery if my diastasis recti hasn't fully closed?
Most mums do not. Surgery is generally reserved for cases with significant symptoms that don't respond to conservative care. Evidence supports rebuilding the core with progressive exercise first — we cover this in can you close diastasis recti without surgery. Always discuss your options with a GP or women's health physio.
Sources: Sperstad JB et al., "Diastasis recti abdominis during pregnancy and 12 months after childbirth," British Journal of Sports Medicine, 2016; NHS — guidance on abdominal separation (diastasis recti) after pregnancy.
This article is general education, not medical advice, and Mumma Glow is not affiliated with MUTU or any other named program. Results vary from mum to mum. Always check with your GP, midwife or a women's health physiotherapist before starting or progressing postpartum exercise, especially if you have pain, a large separation or any concerns.