Diastasis Recti in Men: Causes, Signs, and Physiotherapy in BC

A vertical ridge or soft gap down the centre of your abdomen that shows up when you sit up or brace is usually diastasis recti, not a hernia, but the two are easy to confuse and worth telling apart. This post covers what causes diastasis recti in men, how it differs from a hernia, and what a physiotherapy assessment actually checks.

What Diastasis Recti Is, and Why It Is Not Only a Postpartum Condition

Diastasis recti is a separation of the linea alba, the band of connective tissue that runs down the centre of the abdomen and joins the two sides of the rectus abdominis muscle. The muscles themselves do not tear or split. The connective tissue between them stretches and loses tension, and the two muscle bellies sit further apart than they should.

Most public information about this condition is framed around pregnancy. The growing uterus places sustained pressure on the linea alba, and separation is common by the third trimester. But the same tissue can stretch under other kinds of sustained pressure. A cross-sectional study of 1,575 men found diastasis recti in 29.78 percent of the group using a greater-than-2 cm inter-recti distance as the cutoff, narrowing to 10.16 percent at a stricter greater-than-3 cm cutoff (Prevalence, risk factors, and adverse outcomes of diastasis of rectus abdominis in men, Hernia, 2024). A 2025 narrative review of the condition in male patients puts the reported prevalence range at 25 to 30 percent, higher again in men over 60 with obesity or low physical activity (Rectus diastasis in males: a narrative review, Hernia, 2025). Nobody is looking for this in men nearly as often as they look for it in postpartum women, which is a large part of why it stays under-recognized.

What Causes It in Men

The mechanism is the same regardless of sex: sustained or repeated intra-abdominal pressure that the linea alba cannot fully resist. In men, that pressure tends to come from a smaller set of sources.

Heavy lifting or straining without adequate core progression is the one we see most in clinic, particularly training programs that load heavy compound lifts or high-rep abdominal work before someone has built the capacity to brace properly under that load. A large or fairly sudden weight change, gain or loss, stretches or slackens the tissue in a similar way to how pregnancy does. Chronic straining from constipation or a chronic cough adds up over time the same way a single heavy lift does in one moment.

Abdominal surgery is a less-discussed cause worth naming directly. A midline surgical incision runs through or near the linea alba, and the healing scar tissue does not always regain the same tensile strength as the tissue it replaced. Men recovering from abdominal procedures, including hernia repairs, bowel surgery, or other midline incisions, can develop diastasis recti as a result of that altered tissue, separate from any hernia the surgery addressed. The cross-sectional study above also found age, BMI, smoking, and physical exercise habits acted as influencing factors, with increasing age, higher BMI, and diabetes standing out as independent risk factors for the condition developing.

Diastasis Recti or Hernia: How to Tell Which One You Have

This is usually the real question behind a midline bulge, and it deserves a direct answer. One caveat first: a physiotherapist does not diagnose a hernia and will refer you onward if one is suspected.

A hernia is a defect in the fascia itself. Tissue, usually fat or a loop of bowel, can push through that gap, which is why a hernia often changes shape or size with straining, coughing, or standing, and can sometimes be pushed back in. A hernia can also become painful, tender, or in rare cases trapped, which is a same-day medical concern rather than something to wait out.

Diastasis recti is a widened but intact band of connective tissue. The fascia has stretched, not torn, so nothing pushes through it, and it does not carry the same risk of strangulation that a hernia does. The visible sign is usually a long ridge or doming running from around the breastbone toward the navel when you tense your abdomen, rather than a discrete round lump.

The two conditions are not mutually exclusive, and that overlap matters. The same cross-sectional study of men found a hernia present in 56.1 percent of the men who had diastasis recti when using the stricter 3 cm cutoff, a strong enough association that the authors flagged it as clinically significant. If you have a bulge and are not sure which you are dealing with, or whether you might have both, that is a reason to get it looked at rather than to guess from a description online. A physiotherapist can screen for the pattern that suggests diastasis, but a hernia needs a physician or surgeon to confirm and manage.

Signs Worth Getting Assessed

Not every case needs treatment. A mild separation with good tissue tension and no functional complaints often does not require intervention beyond general awareness of how you load your core.

The signs we would want to see in an assessment include visible coning or doming down the midline when you sit up, brace, or lift, which suggests the abdominal wall is not distributing load evenly. Persistent low back or pelvic girdle discomfort that has not resolved on its own is another. A sense that your core "gives way" or cannot generate meaningful tension under load, particularly if it has changed since a period of heavy training, a significant weight change, or surgery, is worth a look. Any bulge that changes size with straining, or that is tender, warrants a same-day call to your physician rather than a physiotherapy booking, because that pattern points toward a hernia rather than a diastasis.

What a Physiotherapy Assessment Actually Checks

A physiotherapy assessment for diastasis recti goes beyond counting how many fingers fit into the gap at your navel. Finger-width tells you how wide the separation is when you are relaxed. It says nothing about whether the tissue can generate tension when you load it, and that functional capacity is what determines how much rehab you need.

The assessment looks at the quality and tension of the linea alba under load, not just its resting width. It checks how the deep core, specifically the transversus abdominis, coordinates with your breathing and bracing pattern, since a lot of self-directed core work goes wrong here: people hold their breath, bear down instead of bracing, or recruit the wrong muscles entirely. It also looks at how you manage pressure during the movements that actually matter to you: getting up off the floor, lifting at work or in the gym, or returning to a specific sport or training program.

From there, a program is built around restoring coordination and load tolerance rather than a list of exercises to avoid. Early stages often focus on breath mechanics and low-load bracing. Later stages progress toward the loaded movements you actually need to do, whether that is a barbell lift, a return to a contact sport, or simply carrying a child without discomfort.

Where This Connects to Pelvic Floor Physiotherapy

The linea alba, the deep core muscles, and the pelvic floor work together as a pressure management system, in men the same way they do in women. When one part loses function, the others end up compensating. Treating a diastasis in isolation, without checking pelvic floor coordination, can leave part of the problem untouched.

Launch Rehab already runs a men's pelvic floor physiotherapy program, most often for leakage after prostate surgery, covered in more detail in our men's pelvic floor physiotherapy post. If your case involves both a midline separation and pelvic floor symptoms, whether that is leakage, a sense of pelvic pressure, or lingering effects from abdominal or pelvic surgery, mentioning both at booking means one physiotherapist can assess the full picture rather than splitting it across two visits. The same tissue-tension and load-management approach we use in our postpartum diastasis recti post applies here, adjusted to your history rather than assumed to be pregnancy-related.

When to See a Physiotherapist

The practical answer is whenever a midline bulge or a change in how your core manages load has become a pattern rather than a one-off. That includes a visible ridge or doming that shows up consistently when you brace, a core that feels like it has stopped working the way it used to after a period of heavy training or a significant weight change, or ongoing changes since an abdominal surgery.

If you are not sure whether what you are seeing is diastasis recti, a hernia, or something else entirely, an assessment is where a physiotherapist checks the tissue and the movement pattern directly, and refers you onward if the findings point toward a hernia or another surgical concern rather than something physiotherapy addresses. Booking and coverage details, including which studios offer pelvic floor and core physiotherapy, are on our rates and FAQ page. The strongest outcomes tend to come from getting the diagnosis right first, then building load tolerance deliberately, rather than guessing at home for months.

This article is general information, not personal medical advice. A regulated practitioner can confirm whether the patterns described apply to you.

Frequently asked questions

Can men actually get diastasis recti, or is it only a postpartum condition?

Yes. It is most commonly discussed in the context of pregnancy, but the same tissue separation can happen in men from heavy straining, a large or sudden weight change, or a healing abdominal surgical scar. Peer-reviewed research puts the prevalence in men in the 10 to 30 percent range depending on the measurement threshold used.

How do I know if my abdominal bulge is a hernia or diastasis recti?

A hernia is a gap in the fascia that something can push through, often changing shape with straining and sometimes becoming tender. Diastasis recti is a stretched but intact band of tissue, usually seen as a ridge rather than a lump. The two can occur together, so a bulge that is tender, enlarging, or changes with straining is worth a same-day call to your physician instead of a physiotherapy booking.

Does a wide gap always mean I need treatment?

No. Gap width alone does not determine whether treatment is needed. A physiotherapy assessment looks at tissue tension and how your core manages load under real movement, not just the resting distance between the muscles.

What does a physiotherapy assessment for diastasis recti involve?

History, a check of tissue tension rather than just gap width, and an assessment of how breathing, bracing, and the deep core coordinate during movement like lifting or getting up off the floor. From there, a physiotherapist builds a program around restoring load tolerance.

Is diastasis recti connected to pelvic floor problems in men?

The two systems work together to manage pressure through the trunk, so they can be connected. If you have both a midline separation and pelvic floor symptoms such as leakage, mention both at booking so the assessment covers the full picture.

Can diastasis recti in men resolve without surgery?

Often, yes, particularly when the cause is training-related or tied to a weight change rather than a structural surgical issue. Physiotherapy focused on load tolerance and core coordination is a first-line, non-surgical option. Cases involving a significant hernia or ongoing structural concern need a surgical opinion.

Sources

• Prevalence, risk factors, and adverse outcomes of diastasis of rectus abdominis in men: a cross-sectional study, Hernia (2024)
• Rectus diastasis in males: a narrative review, Hernia (2025)
• Diastasis Recti (Abdominal Separation): Causes and Treatment, Cleveland Clinic
• College of Health and Care Professionals of BC (CHCPBC): regulator of physiotherapists in British Columbia