Diastasis Recti: What the Gap Doesn't Tell You

The first question almost every client asks me about diastasis recti is how many fingers wide the gap is. I understand why. It is measurable, it is concrete, and it feels like something to fix. But over the years I have come to believe the finger count tells you far less than people assume.

A gap is a description of tissue distance. It does not tell you how well someone can generate tension across that tissue, how their breath moves, whether their pelvic floor and diaphragm are working together, or how they load their spine during ordinary movement like getting off the floor or lifting a child. Two people with the same measurement can function completely differently.

What Large Studies Say About the Gap

It helps to know how ordinary a gap is. In a Finnish study of 1,840 women around age 35, researchers measured the gap with ultrasound at six spots along the midline. Women who had given birth had an average gap of about 2.7 centimetres. Women who had never given birth had about 1.5.¹ The authors described the gap as a normal range, not an on-off switch. They noted that a gap of up to 5 centimetres sits within the upper end of what they saw in the population, and that any cut-off number should be weighed against symptoms, to avoid treating people unnecessarily.

What about exercise? A 2026 review pooled nine randomised trials with 450 women. Structured exercise narrowed the gap by about 8 millimetres on average, and more when it began within three months of birth.² That is real. But in the two trials that also measured everyday function with a disability questionnaire, the exercise groups and the comparison groups scored about the same. The questionnaire was not built for this condition, and the authors call for ones that are.

Put together, this is why I ask about coughs and stairs before I ask for a finger count. The tape measure can move without daily life changing, and daily life can change while the tape measure stays put. Both are true, and neither is a promise.

Where Coaching Fits, and Where It Doesn't

I want to be careful here, because I am not a physiotherapist and this is not a diagnosis. A significant separation, especially one paired with doming, pain, or a sense of the midline giving way under load, deserves a proper clinical assessment. What I offer as a coach sits alongside that assessment, working on breath mechanics, deep core activation, mobility, and progressive strength once someone understands what they are actually dealing with.

One Client's Three Months

I think about one client in particular, because her experience shaped how I talk about this now. She came in with a five-finger separation, which by most measures is considered significant. Over three months of breathwork, deep core activation, progressive mobility work, strength rebuilding, and changes to how she moved through her day, that gap reduced to two fingers. I want to be direct about what that is and is not. It is one person's experience, not a guarantee, not a timeline anyone else should expect to match. Her tissue, her history, her consistency, and her life circumstances all shaped that outcome, and someone else doing the same work might see a different result on a different timeline, or a result that shows up as improved function before it shows up as a smaller measurement.

That last point matters more than people give it credit for. The gap closing is not the goal, capacity is — being able to trust your midline under load, whether that load is a laundry basket, a stroller, or a squat. I have worked with clients whose gap barely moved in the numbers but who could suddenly do things they could not do three months earlier, and I have worked with clients whose gap closed considerably before their confidence caught up with it.

So when someone tells me their finger count, I ask more questions. What happens when you cough. What happens when you get out of bed. What happens when you carry your baby up a flight of stairs. The measurement is one data point in a much larger picture, and treating it as the whole story is, I think, part of why so many women feel like they are failing at something that was never a simple number to begin with. That is exactly the kind of question a proper first conversation is built to answer.

If you are working on this after birth, you can read how postpartum support coaching approaches it.