How to Fix Abdominal Separation | Safe Core Exercises

You notice a ridge or bulge running down the middle of your belly when you sit up from lying down. It looks like a small tent has pitched along your midline. This is abdominal separation, and if you’re postpartum or have done heavy lifting for years, you’ve probably seen it and wondered what to do.

The honest answer is that you can’t “fix” the separation overnight, but with the right approach you can manage it safely, often reducing the gap significantly over time. It requires retraining how you use your core muscles and avoiding the movements that make it worse. Here’s how that actually works.

What Abdominal Separation Actually Is

Diastasis recti is the partial or complete separation of the rectus abdominis muscles along the midline. Those are the “six-pack” muscles, normally held together by a band of connective tissue called the linea alba, according to the Cleveland Clinic.

When that tissue stretches — often from pregnancy, heavy lifting, or rapid weight changes — the muscles drift apart. The gap can be a finger-width or several fingers wide. It’s not a hernia, though it can look and feel similar.

This condition is extremely common during and after pregnancy. Research suggests it occurs in a significant percentage of pregnant and postpartum women, though men can develop it too from factors like improper lifting technique or carrying excess abdominal weight.

Why The “Crunch Reflex” Makes It Worse

Most people’s instinct when they notice a weak stomach is to do sit-ups or crunches. That’s exactly the wrong move. Those exercises push the abdominal wall outward and stretch the already-stressed linea alba further.

• Avoid sit-ups and crunches: These directly strain the connective tissue and can widen the gap. Multiple Tier 1 sources list them as the top exercises to avoid.
• Watch for coning or doming: If your belly forms a ridge or peak when you tense your core, that’s a sign the separation is being stressed. Stop that movement immediately.
• Skip planks initially: During the early healing phase, planks put excessive pressure on the midline. They can be reintroduced later with proper technique.
• No heavy lifting until cleared: Heavy loads increase intra-abdominal pressure. Your physical therapist will tell you when it’s safe to return to deadlifts or carrying heavy car seats.
• Beware of forward stretches: Exercises that stretch the connective tissue in a forward or sideways direction can make the separation worse rather than better.

This isn’t about being lazy — it’s about respecting the body’s current mechanics. Many conventional core exercises simply aren’t safe for this condition until the gap has had time to close.

The First Step: Relearning How To Brace

Before you do any real movement, you need to find your deep core muscles again. The Ohio State University Wexner Medical Center explains that the first step to fix diastasis recti is learning to contract the abdominal muscles gently — think tightening your belly as if trying to fit into tight pants, while keeping your spine neutral.

This movement is called abdominal bracing. You engage the core as if bracing for a light punch, without sucking in or pushing out. It’s subtle, and many new moms are surprised how hard it is to find this muscle after pregnancy.

Lie on your back with knees bent, feet flat. Inhale normally, then on the exhale gently draw your belly button toward your spine without holding your breath. That’s the brace. Hold it for 10-20 seconds. Repeat several times daily.

These movements keep your spine in a natural curved position, unlike the flexed postures of crunches. They are the foundation that everything else builds on.

Building Up Gradually: Your Exercise Progression

Once you can consistently brace and breathe at the same time, you can add gentle movement. Your physical therapist can design a personalized program, but the general path follows a specific progression.

1. Master the breath-brace connection: This takes most people one to three weeks. Don’t rush past this step; it’s the foundation.
2. Add gentle isolated movements: Pelvic tilts and heel slides come next. These teach the core to work while other body parts move.
3. Introduce quadruped exercises: Bird dog (lifting one arm and opposite leg while on hands and knees) is a classic safe progression. Keep the core engaged and spine stable.
4. Reintegrate standing core work: Once you can brace lying down, practice bracing while standing, walking, and doing daily activities like picking up a toddler.
5. Return to planks with caution: At this point, you can test planks, but stop if you feel any coning or doming. Not everyone will be ready for them, and that’s okay.

Hospital for Special Surgery progress to planks as one later-stage option, but only after the midline has adequately healed and you can maintain a flat core throughout the movement.

Support Tools And When To Consider Surgery

Abdominal support belts or pregnancy bands may help decrease the separation for some people, though the evidence is moderate. They provide gentle compression that keeps the muscles approximated during daily activity. Think of them as training wheels, not a solution.

For mild to moderate cases, targeted physical therapy and specific core-strengthening exercises are the standard treatment and often close the gap significantly. Columbia Surgery notes that surgery (diastasis recti repair) is a viable option for those with severe separation that has not responded to non-surgical treatments.

Physical therapy is strongly recommended, even if the gap seems small. A physical therapist can check for coning during movement, teach you the exact brace pattern for your body, and ensure you aren’t compensating with your back or pelvic floor.

The Bottom Line

Abdominal separation is manageable with the right approach, not a life sentence of a weak core. Start with gentle bracing exercises, avoid sit-ups and crunches entirely, and build up slowly over several weeks. Consistency matters more than intensity here — small daily practice beats occasional hard sessions.

If you’ve been struggling with a gap that isn’t shrinking after several months of gentle work, or if you notice coning or doming during movement, a physical therapist or pelvic floor specialist can assess your specific case and adjust your plan to match how your body actually moves.