Diastasis Recti (Abdominal Separation)

What diastasis recti is

The two halves of the rectus abdominis muscle run vertically from the ribs to the pubic bone. They are joined in the middle by a band of connective tissue called the linea alba. During pregnancy, the growing uterus and hormones stretch and soften the linea alba, so the muscles move apart. This is a normal adaptation, and the gap is present in most people by the end of pregnancy. For many, it narrows on its own in the first 8 weeks after birth. In others, the gap or the laxity of the tissue persists.

A gap of about 2 cm (roughly 2 finger widths) or more is usually considered diastasis recti. The tension and firmness of the linea alba matter as much as the width.

Signs and symptoms

• a ridge, cone or doming down the middle of the belly when you sit up, lift your head or strain
• a soft, jelly-like feeling above or below the belly button
• a belly that still looks pregnant months after birth
• weak core and difficulty lifting
• lower back pain and pelvic discomfort in some people
• poor posture

Diastasis recti is often linked with pelvic floor problems such as urinary incontinence, because the core and pelvic floor work together.

Causes and risk factors

• pregnancy, especially multiple pregnancies, twins, or a large baby
• age over 35 at pregnancy
• cesarean delivery (some studies)
• abdominal obesity and repeated heavy straining in men
• in newborns, especially premature babies, an incomplete joining of the muscles that usually resolves as they grow

Diastasis recti vs hernia

The two can occur together. An umbilical hernia commonly accompanies diastasis recti after pregnancy. See abdominal hernia.

How to check for diastasis recti

1. Lie on your back with knees bent and feet flat.
2. Place your fingertips across the midline of your belly, just above the belly button, with fingers pointing toward your feet.
3. Gently lift your head and shoulders off the floor, as in a small crunch.
4. Feel for a gap between the muscle edges and note how many fingers fit, and how deep your fingers sink.
5. Repeat just below the belly button and halfway up to the breastbone.

A gap of 2 or more finger widths, or deep, soft sinking, suggests diastasis recti. A physical therapist can measure it more precisely, and ultrasound can measure the exact distance.

Treatment

Physical therapy and exercise

Supervised exercise with a physical therapist trained in women's health or postpartum care is the main treatment. Programs typically focus on:

• Breathing and deep core activation: diaphragmatic breathing and drawing in the deep transverse abdominis muscle.
• Pelvic floor exercises coordinated with core work.
• Progressive strengthening: heel slides, toe taps, bridges, side planks and modified planks, progressing as control improves.
• Posture and lifting technique: exhaling and engaging the core before lifting your baby or car seat, and rolling to your side to get out of bed.

Research suggests that learning to generate tension across the linea alba with the deep core may be as important as narrowing the gap.

What to avoid early on

Avoid exercises that make your belly dome or bulge before you have rebuilt control, such as full sit-ups, crunches, heavy twisting and front-loaded planks. These are not forbidden forever, but should be reintroduced gradually with good technique.

Surgery

If diastasis recti is still significant and bothersome after at least 6 to 12 months of rehab, and you are not planning another pregnancy, surgery is an option. Abdominoplasty (tummy tuck) with plication stitches the muscles together and removes loose skin. A hernia, if present, is repaired at the same time. It is usually considered cosmetic, though coverage varies.

Outlook

Many people see the gap narrow and function improve within the first year after birth, especially with targeted exercise. A persistent gap is not dangerous in itself. With good core strength, many people function well even if some separation remains.

Frequently asked questions

How do I know if I have diastasis recti?

Lie on your back with knees bent, place your fingers across your midline above and below the belly button, and lift your head slightly. A gap of 2 or more finger widths, or a ridge or doming down the middle, suggests diastasis recti. A physical therapist can confirm it.

Can diastasis recti heal on its own?

Often, yes. The gap narrows naturally in many people during the first 8 weeks after birth. When it persists, targeted core and pelvic floor exercises usually improve both the gap and core function. Surgery is only needed for persistent, bothersome cases.

What exercises are best for diastasis recti?

Deep core breathing, transverse abdominis activation, pelvic floor exercises, heel slides, bridges and modified side planks are typical starting exercises. Progress gradually, and avoid movements that cause your belly to dome until you have good control. A physical therapist can guide you.

Is diastasis recti the same as a hernia?

No. Diastasis recti is a stretching of the tissue between the abdominal muscles without a hole, so bowel cannot get trapped. A hernia is a hole in the abdominal wall through which tissue pushes out. They can occur together, especially at the belly button.

Can men get diastasis recti?

Yes. Men can develop diastasis recti from abdominal obesity, repeated heavy lifting with poor technique, or aging. It is also common in newborns, where it usually resolves without treatment.