Diastasis Recti Exercises: How to Train With Ab Separation

Diastasis recti is a separation of the rectus abdominis muscles along the midline of the abdomen, and you can absolutely train with it if you know which exercises to use and which to avoid. The separation creates a gap that reduces the force transfer capacity of your core. Crunches, sit-ups, and traditional planks push pressure directly through that gap and can make it wider. But that doesn't mean your core is off-limits. It means your core training needs a specific progression that respects the tissue's current state while rebuilding it systematically.

At CoachCMFit, we see this in new clients fairly often. Someone arrives for their first session, mentions they had a C-section or vaginal delivery in the past few years, and nobody has ever screened them for diastasis recti. They've been doing crunches at home because they want to "get their core back." Every rep is working against them, and they have no idea. The screen takes two minutes. The information it gives changes the entire program.

How to check yourself for diastasis recti

You don't need equipment for this. You need two minutes and your own hands.

Lie on your back with your knees bent and feet flat. Place two fingers horizontally across your midline. Check three spots: 2 inches above your navel, at your navel, and 2 inches below. Slowly lift your head and shoulders off the floor like a small crunch. Feel for a gap where your fingers can press down, or a soft ridge where the tissue lacks tension.

Measure both the width (how many finger widths fit in the gap) and the depth (how far your fingers sink before hitting resistance). Two or more finger widths with soft, spongy tissue indicates diastasis recti. The tissue tension test matters as much as the gap size. A 2-finger gap with firm tissue is less of a functional problem than a 2-finger gap with no resistance at all.

What the research says about diastasis recti and exercise

Exercises to avoid with diastasis recti

This list matters. These movements generate excessive intra-abdominal pressure that pushes outward through the gap and can worsen the separation or prevent healing:

• Crunches and sit-ups (flex the spine, push pressure through the midline)
• Leg raises (high hip flexor demand creates significant intra-abdominal pressure)
• Traditional front plank (until gap closes to under 2 fingers with good tissue tension)
• Heavy bilateral movements with breath-holding (squats, deadlifts at high loads without proper bracing technique)
• Burpees and jumping exercises (impact plus rapid pressure changes)
• Oblique crunches and bicycle crunches (rotational loading on a compromised midline)

The test for any exercise: watch for doming or coning at your midline during the movement. If your abdomen bulges upward in a ridge or cone shape, that exercise is generating more pressure than your tissue can manage right now. Stop it and regress to an easier version. Training abs without crunches is exactly the approach that works here, and there are many effective options.

The CoachCMFit 4-phase diastasis recti protocol

CoachCMFit uses a 4-phase progression for clients with diastasis recti. Each phase must be mastered before advancing. Rushing this timeline is the most common mistake and the one that leads to setbacks.

The exhale-on-exertion rule: your permanent override

This rule applies to every single rep for life, not just during rehabilitation. Exhale as you exert force. Inhale on the easier phase. Squat down: inhale. Stand up: exhale. Lower the dumbbell: inhale. Curl it up: exhale. This breathing pattern prevents the Valsalva maneuver (breath-holding under load) from spiking intra-abdominal pressure and pushing through the midline.

It feels counterintuitive at first. Powerlifters use breath-holding intentionally for maximal lifts because it stiffens the trunk and allows heavier loads. That works fine with an intact linea alba. With diastasis recti, it's exactly the wrong approach until Phase 4 at minimum, and even then, conservative breath management is the rule.

Training the rest of your body while rehabilitating your core

A diastasis recti diagnosis does not mean you stop training legs, back, or upper body. It means you modify how you brace for compound movements and avoid the specific exercises listed above. Building core strength through this protocol runs alongside regular lower and upper body training. The two tracks are not in conflict.

Lower body training: goblet squats, leg press, hip thrusts, Romanian deadlifts, and reverse lunges are all manageable from Phase 2 onward with the exhale-on-exertion rule in place. Glute activation work specifically supports the pelvic floor and lumbopelvic stability that diastasis recti compromises, making it a direct complement to the core rehabilitation protocol.

Upper body: rows, lat pulldowns, chest press, and shoulder work can proceed normally. The key is avoiding exercises that require significant trunk stability under load, specifically overhead pressing with heavy weight, until Phase 3. Similar considerations apply to other special population training protocols; the principles in training with joint conditions follow the same "earn range and load gradually" framework.

Reassessing progress: what improvement actually looks like

Check gap width and tissue tension every 4 weeks. You're looking for: gap narrowing (gradual, not sudden), increased tissue tension when you press into the midline, reduced or eliminated doming during exercises that previously caused it, and improved functional symptoms like less lower back pain, better lifting capacity, and improved posture.

Scale and mirror progress will likely follow the core rehabilitation progress. Most people with diastasis recti have a protruding abdomen that doesn't change with fat loss alone because the muscular support is compromised. As the linea alba regains tension and the transverse abdominis learns to activate properly, the abdomen draws in and flattens. This isn't fat loss. It's structural restoration, and it's meaningful.