Diastasis Recti After 40: Can You Still Fix It?

You've heard the term. But you might not be sure if it applies to you.

Diastasis recti — the separation of the rectus abdominis muscles along the midline of the abdomen — is most commonly talked about in the context of pregnancy. And it's true that it often develops during pregnancy, when the growing uterus pushes against the abdominal wall and the midline connective tissue (the linea alba) stretches to accommodate it.

But here's what doesn't always get said: diastasis recti can persist for years, even decades, after childbirth. And in your 40s, you might suddenly become more aware of it — whether that's because menopause-related weight redistribution has changed your abdomen, because you've started a new exercise programme, or because a physiotherapist has finally identified what's been there all along.

Can you fix it after 40? In most cases, yes. Not overnight — but yes.

What diastasis recti actually is

Your rectus abdominis is the pair of muscles that run vertically down the front of your abdomen (the “six-pack” muscles, though they're doing a lot more work than that implies). They're connected along the midline by the linea alba — a band of connective tissue.

In diastasis recti, that midline connection stretches or thins, and the gap between the two muscle bellies widens. The technical threshold is typically a gap of 2.5cm or more, though the tension in the linea alba (how well it can transfer force) matters as much as the width of the gap.

It's not a hernia — no organs are pushing through the abdominal wall. But a wide, low-tension diastasis means your deep core can't function the way it's meant to, which affects everything from posture and lower back pain to pelvic floor function and bladder control.

How do you know if you have it?

The classic self-check: lie on your back with knees bent. Place your fingertips horizontally across your midline, just above your belly button. Slowly lift your head and shoulders as if starting a crunch. If you feel a gap — especially one that feels “squishy” or lacks resistance — that's worth investigating with a physiotherapist.

You might also notice:

• A ridge or “dome” of tissue down the midline of your abdomen when you do a sit-up or crunch
• A feeling of abdominal weakness that doesn't improve with exercise
• Lower back pain that doesn't seem to have another obvious cause
• Feeling like your core just won't engage properly
• Bladder leakage or prolapse symptoms (which can be connected — the deep core and pelvic floor are part of the same system)

A pelvic floor physiotherapist can give you a proper assessment — both measuring the gap and evaluating the tension and function of the linea alba. This matters, because treatment depends on both.

Does it get worse in perimenopause?

It can, yes. A few things happen in perimenopause that are relevant:

Oestrogen affects connective tissue. The linea alba is connective tissue, and oestrogen plays a role in maintaining its strength and elasticity. As oestrogen declines, connective tissue throughout the body tends to lose some of its resilience — which can mean an existing diastasis becomes more symptomatic, even if the gap itself hasn't widened.

Core muscle changes. Hormonal shifts in perimenopause affect muscle mass and recovery. The transverse abdominis — the deep core muscle that wraps around the abdomen like a corset — can become less responsive and harder to engage. Since this muscle is the primary support structure for the linea alba, its reduced function tends to make diastasis symptoms worse.

Weight redistribution. The hormonal shift toward abdominal fat storage in perimenopause — even without overall weight gain — changes the mechanical load on the abdominal wall. This doesn't cause diastasis, but it can make existing cases more noticeable or more symptomatic.

What actually helps

The right kind of core work

This is the crucial piece: not all core exercises are created equal when you have diastasis recti. Traditional crunches, sit-ups, and exercises that cause “coning” or “doming” at the midline should be avoided until you've built some foundational tension, because they can worsen the separation.

What does help:

• Transverse abdominis activation — gentle drawing-in and bracing exercises that engage the deep core without loading the midline under tension
• Dead bugs and bird dogs — slow, controlled movements that challenge the core to resist rotation without spinal flexion
• Glute and hip work — because the posterior chain supports the core from behind
• Breath work — learning to use the diaphragm and pelvic floor in coordination with the abdominals

The goal is to progressively restore tension in the linea alba and build deep core strength before adding load. A physiotherapist who understands diastasis recti can build a progressive programme for you — this is genuinely not something to DIY based on internet instructions, because the wrong exercises can set you back.

Address the pelvic floor connection

Diastasis recti and pelvic floor dysfunction often show up together — not surprisingly, since both involve the deep core system. If you're experiencing bladder leakage, urgency, or prolapse symptoms alongside your diastasis, treating them as part of the same system (which they are) tends to produce better outcomes than addressing them separately.

Our guide to why kegels alone aren't enough is relevant reading here — the whole-core approach applies to diastasis recti as much as to pelvic floor weakness.

Supporting tissue health

Connective tissue health is supported by adequate protein, collagen synthesis (which requires vitamin C), and reducing chronic inflammation. This isn't a quick fix, but it's part of the longer-term picture — particularly as oestrogen levels decline and connective tissue needs more nutritional support to maintain its integrity.

What about surgery?

Surgical repair (abdominoplasty or “tummy tuck”) is an option for significant diastasis that hasn't responded to conservative management — but it's generally recommended only after consistent, supervised rehabilitation has been tried. Most women with diastasis recti do not need surgery, and surgery doesn't address the underlying core dysfunction if rehabilitation hasn't been completed first.

If you're considering this route, please see a urogynaecologist or plastic surgeon who has specific experience with diastasis recti repair, not just cosmetic abdominoplasty.

It's not just about how your stomach looks

Diastasis recti gets talked about a lot in the context of aesthetics — the “mummy tummy” framing. But the symptoms that matter most are functional: the lower back pain, the pelvic floor weakness, the feeling that your body isn't supporting itself the way it should.

Getting a proper assessment and starting the right rehabilitation programme can make a real difference to how you feel day-to-day — not just how your abdomen looks.

Head to our guide to finding a pelvic floor physio if you're ready to get an assessment. And download our free guide on 5 things weakening your pelvic floor — several of them also apply to diastasis recovery.

More on how hormone changes connect to pelvic and core health is covered in our Pelvic Floor & Core hub.

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This article is for informational purposes only and does not constitute medical advice. Please see a qualified healthcare provider or pelvic floor physiotherapist for a personal assessment.