Most of what is written about diastasis recti assumes you have recently had a baby, which makes it easy for men to conclude the condition does not apply to them. It does. Abdominal separation in men is common — it shows up as a ridge or dome down the centre of the stomach when you sit up, a belly that stays rounded no matter how lean you get, and often a nagging lower back. It arises from the same mechanism as the postpartum version: sustained pressure that stretches the linea alba, the connective seam between the two halves of the six-pack. The causes are different, the fix is largely the same, and you can make substantial progress at home.
Key takeaway: Diastasis recti in men usually comes from years of raised abdominal pressure — weight gain and loss, heavy lifting with a held breath and poor bracing, chronic cough or straining. The fix is deep core training: learn to tension the transverse abdominis and pelvic floor on the exhale, load it progressively over 8–12 weeks, and drop crunches, breath-holding and straining. See a doctor if there is a bulge that could be a hernia.
The best diastasis recti exercises for men train the deep core rather than the six-pack: transverse abdominis activation on a slow exhale, heel slides, bent-knee dead bugs, glute bridges, bird dogs, modified then full side planks, and a properly braced, exhaled squat pattern for lifting. Each is done with the belly flat and never doming. Crunches, sit-ups, leg raises and breath-held heavy lifts are removed until the wall can hold tension. Sophie Mercer, PMA-certified clinical Pilates instructor, designed an 8-week Lower Back Pain protocol of 34 exercises built around exactly this deep core stabilisation.
Why do men get diastasis recti?
The linea alba stretches when the pressure inside the abdomen is high for long enough. In pregnancy the cause is obvious. In men it is usually a combination of:
- Weight gain, especially visceral fat. A large abdomen pushes the wall outward from the inside for years. Losing the weight afterwards can leave a stretched, slack midline that no longer springs back.
- Heavy lifting with poor bracing. Holding the breath and bearing down under a heavy bar, or “pushing the belly out” into a belt, drives pressure forward against the linea alba. Done for a decade, it wins.
- Chronic cough, straining and constipation. Repetitive spikes of pressure, thousands of times a year.
- High-volume crunches and sit-ups, which shorten the rectus and bulge the contents forward.
- Genetics and age. Some men have naturally laxer connective tissue, and the tissue loses elasticity with age.
It is worth ruling out a hernia. A diastasis is a widening; a hernia is a hole. If you have a discrete lump that is tender, does not flatten when you lie down, or appeared suddenly, see your GP before exercising.
How to check yourself
Lie on your back, knees bent. Put your fingers horizontally across your midline just above the navel. Lift your head and shoulders slightly and feel how many fingers drop into the gap and how deep it feels. Repeat at the navel and below it. Two fingers or more, or a soft, deep trench, suggests a diastasis. Note whether the ridge domes when you lift — that doming is the signal you will use to gauge every exercise.
Diastasis recti exercises for men
The principle: teach the transverse abdominis (the deep corset muscle), the pelvic floor and the diaphragm to tension the wall together, then load that tension gradually. Yes, men have a pelvic floor, and yes, it matters.
- Exhale activation. Lie on your back, knees bent. Inhale into the belly. Exhale slowly through pursed lips and, as the air leaves, gently lift the pelvic floor and draw the lower belly in and flat. About 30 per cent effort. 10 breaths, twice daily. The belly should firm and flatten, not push out. This is the whole method in miniature.
- Heel slides. Exhale, set, and slide one heel out along the floor; inhale to return. 8–10 each side. No pelvic rocking, no doming.
- Bent-knee dead bug. Knees over hips, arms up. Exhale and lower one heel to tap the floor while the opposite arm reaches overhead. 8 each side. Lower back stays gently on the mat.
- Glute bridge. Exhale, set, and roll the hips up to a straight line; inhale down. 12. Strong glutes take load off the lower back and the abdominal wall.
- Bird dog. Hands and knees. Exhale and reach opposite arm and leg without the belly sagging. 8 each side. Progress to holding for 5 seconds.
- Side plank. Start on forearm and knees, 20 seconds, then progress to straight legs. 3–4 each side. The obliques attach into the linea alba and help tension it.
- Braced squat pattern. Stand, feet shoulder-width. Inhale into the belly, then exhale and set the core as you squat to a chair and stand. 10. This is the lifting pattern you will use in real life: pressure managed, midline tensioned, never bearing down.
- Farmer’s carry (later). Once the above are easy with a flat belly, walk with a moderate weight in each hand, breathing steadily. Builds real-world trunk stiffness without flexing the spine.
Fifteen minutes, five days a week. Progress each exercise when it is easy and the belly stays flat throughout. The full progression logic is laid out in deep core exercises for diastasis recti, and the ranked list with more detail in the best exercises for diastasis recti.
What to avoid — and how to keep training
- Crunches, sit-ups, hanging leg raises, ab rollouts until the wall holds tension under low load.
- Valsalva under heavy weight without proper bracing. You do not need to stop lifting; you need to brace correctly — inhale into a 360-degree expansion, then exhale slightly and stiffen the whole trunk, rather than pushing the belly forward. Reduce loads while you relearn it.
- Long front planks and push-ups if the belly sags or domes; use knees or an incline.
- Heavy sneezing and coughing unbraced — exhale and tension the wall first.
- Straining on the toilet — a footstool and patience.
Training around a diastasis is entirely possible. Swap flexion-heavy ab work for anti-extension and anti-rotation work (dead bugs, carries, Pallof presses), keep the midline flat, and most men find their lifts improve as their bracing does. If back pain is part of the picture, the same deep core work is central to Pilates for lower back pain.
When to see someone
See a doctor for a lump that could be a hernia, pain in the abdominal wall, a gap wider than three finger-widths with a deep, soft trench, or a separation that is not improving after three months of consistent work. Surgical repair exists and is sometimes the right answer; it works far better on a body that has already learned to tension its deep core.
How the Lower Back Pain protocol helps
Sophie’s 8-Week Lower Back Pain Program is built on the same deep core stabilisation that a male diastasis needs — breath, transverse abdominis and pelvic floor coordination, then progressive loading through bridges, bird dogs, side-lying work and functional patterns across 34 exercises — with no crunches and nothing that domes the belly. It suits men whose separation comes with the very common companion of a stiff, aching lower back. If you would prefer the programme written specifically around abdominal separation, the core method of the 8-Week Postpartum Recovery Program applies equally to men; the birth-specific sections simply do not apply, and the exercise progression is identical.
This article is for informational purposes only and does not constitute medical advice. Abdominal separation can be confused with a hernia; if you have a discrete lump, pain, or a bulge that appeared suddenly, please see a doctor before starting or changing an exercise programme.