Diastasis recti at-home test

What diastasis recti is

The rectus abdominis (the "six-pack" muscle) is actually two muscles, one on each side, connected by a stretchy band of connective tissue down the middle called the linea alba. During pregnancy, your belly grows, the linea alba stretches, and the two muscle halves move apart.

This is normal during pregnancy — every pregnant person develops some diastasis recti by the third trimester. The question is whether it closes on its own postpartum or whether it stays separated.

It's not a "weak abs" problem. It's a connective tissue stretch problem. Crunches don't fix it — they make it worse.

Who gets persistent diastasis

By 8 weeks postpartum:

• ~60% of postpartum parents still have some degree of diastasis.
• ~40% have closed it spontaneously.
• ~30% have a 2+ finger gap that won't close without intervention.

Higher risk factors:

• Multiple pregnancies.
• Twins or multiples.
• Large baby (over 8.5 lbs).
• Diastasis in a prior pregnancy.
• Older first-time pregnancy (over 35).
• Pre-existing connective tissue laxity (hypermobile joints, Ehlers-Danlos).

The test, step-by-step

When to do it: Earliest at 6 weeks postpartum. Most reliable at 8-10 weeks postpartum.

What you need: A flat surface. That's it.

Position

1. Lie on your back on a firm surface (bed is too soft — try the floor or a yoga mat).
2. Bend your knees, feet flat on the floor about hip-width apart.
3. Place one hand behind your head for support. Use the other hand for the test.

Finding the gap

1. Place 3-4 fingers across your belly horizontally, just above your belly button.
2. Press your fingers gently into your belly (not deep, just enough to feel the tissue).
3. Slowly lift your head and shoulders off the ground, like a partial crunch. Don't lift your back — just the head/upper shoulders.
4. As you lift, feel for the two ridges of muscle on either side of your fingers.
5. Count how many fingers fit in the gap between the two muscles. Slide your fingers across to check the width.

Check three places

1. Just above your belly button.
2. At your belly button.
3. 2-3 inches below your belly button.

The gap is often widest at the belly button. Record the width at each spot.

What the result means

• 0-1 finger gap: Within normal range. Most postpartum parents have a finger or so of gap and this is fine. No intervention needed beyond core retraining.
• 1.5-2 finger gap: Mild diastasis. Almost always closes with appropriate exercise over 3-6 months.
• 2-3 finger gap: Moderate diastasis. Worth a pelvic floor PT consult. Closes with consistent rehab in 3-9 months for most.
• 3+ finger gap or depth into the abdomen: Significant diastasis. Definitely needs PT. Severe cases may not close fully without surgery.

Width isn't the only metric

What also matters:

• Depth. A 2-finger wide, shallow gap is different from a 2-finger wide, very deep gap. Deep gaps mean the linea alba has stretched more.
• Tissue quality. When you press, does the tissue feel firm (good) or soft and squishy (worse)?
• Doming or coning. When you lift your head, does the middle of your belly push outward (looks like a roll bulging up)? That's doming — a sign the abdominal pressure isn't being managed by the core and is going through the gap.
• Function. Can you lift your head without doming? Can you do a heel slide without your belly bulging? Can you lift your baby with proper core engagement?

A PT measures all of these. The home test gives you the width only.

Exercises that close diastasis

These work the deep core muscles (transverse abdominis and pelvic floor) instead of the surface six-pack:

Diaphragmatic breathing

1. Lie on your back, knees bent.
2. Inhale slowly through your nose, letting your belly rise.
3. Exhale slowly through pursed lips, drawing your belly button toward your spine.
4. 10-15 reps, 2-3 times daily.

Heel slides with abdominal brace

1. Lie on your back, knees bent.
2. Inhale, then on the exhale gently draw your belly button toward your spine.
3. Slide one heel away from your body until your leg is straight, keeping your back flat.
4. Slide it back. Switch legs.
5. 10 each side, 2-3 sets.

Pelvic tilts

1. Lie on your back, knees bent.
2. On exhale, tilt your pelvis upward (flatten your low back into the floor).
3. Hold 5 seconds. Release.
4. 10-15 reps.

Marching

1. Lie on your back, knees bent.
2. With your core engaged (belly drawn in), slowly lift one knee toward your chest.
3. Lower. Switch.
4. Watch for doming — if your belly bulges up, the load is too high. Go back to easier exercises.

Exercises that widen diastasis (don't do these)

• Crunches and sit-ups. The most aggravating. Wait until gap is closed.
• Planks (full). Heavy load on the linea alba. Skip until you can hold a wall plank without doming.
• Russian twists. Twisting through a weak midline makes it worse.
• Heavy lifting. Anything over 15-20 lbs until your gap is improving.
• Pushups (traditional). Wait until cleared by PT.
• Hanging leg raises, V-ups. Way too aggressive.
• High-impact bouncing (boot camp, jumping jacks). Wait for clearance.

How long does it take to close?

With consistent appropriate exercise:

• Mild diastasis (2 fingers): 6-12 weeks.
• Moderate (2-3 fingers): 3-6 months.
• Significant (3+ fingers): 6-12 months, sometimes longer.
• Very severe or persistent: Surgical repair (abdominoplasty with rectus plication) is an option, usually after you're done having children.

What helps healing

• Doing the appropriate exercises 5-6 days a week.
• Avoiding the aggravating exercises.
• Working with a pelvic floor PT to dial in technique.
• Wearing a postpartum binder for the first 6-8 weeks (gentle support, not compression).
• Adequate protein for connective tissue repair.
• Hydration.
• Side-lying when getting out of bed (rolling to side first) instead of sitting straight up.
• Avoiding chronic constipation (which puts pressure through the midline).

Pregnancy after diastasis

If you have a 2+ finger gap and you're considering another pregnancy:

• Try to close the gap as much as possible first. The closer to baseline, the better the next pregnancy goes.
• Pelvic floor PT before getting pregnant again is high-value.
• Avoid certain exercises through the next pregnancy — your PT can give you a pregnancy-specific exercise prescription.
• Subsequent pregnancies tend to widen the gap if it didn't close.

When to call your provider

• Gap of 3+ fingers at 8 weeks postpartum.
• Visible "doming" or "coning" of the belly when you lift your head or sit up.
• Lower back pain that's worse with abdominal effort.
• A bulge that appears between the muscles when you cough or strain (could be a hernia).
• Sudden onset of pain along the linea alba.
• If you're not seeing progress after 8-12 weeks of consistent exercise.