What Is Diastasis Recti and Why Does It Happen?

Diastasis recti is a condition where the two large abdominal muscles (called the rectus abdominis muscles) separate or spread apart. These muscles run vertically down the front of your stomach and normally sit close together, separated only by a thin line of connective tissue called the linea alba. When diastasis recti occurs, this gap widens, and the connective tissue between the muscles thins and weakens.

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During pregnancy, the body naturally experiences significant changes to make room for a growing baby. The hormone relaxin increases during pregnancy, which softens connective tissues throughout the body to allow for expansion. Additionally, the weight and size of the baby push outward on the abdominal muscles, creating physical separation. According to research, diastasis recti affects approximately 60 percent of women in the third trimester of pregnancy. After delivery, some separation typically remains, with studies showing that about 40 percent of women still have noticeable separation at six weeks postpartum.

While pregnancy is the most common cause, diastasis recti can also develop in men, non-pregnant women, and children. Other causes include obesity, rapid weight gain, heavy lifting, intense abdominal exercises performed incorrectly, chronic coughing, or straining during bowel movements. Certain genetic factors may also make some people more prone to the condition.

The separation itself is not painful, but it can lead to related problems. A weakened abdominal wall may cause lower back pain, poor posture, pelvic floor dysfunction, or a bulging appearance in the abdomen. Some people experience no symptoms at all. The severity varies greatly—some gaps measure just a finger's width, while others span several inches.

Practical Takeaway: Understanding that diastasis recti is a common physical response to pregnancy (or other causes) rather than a personal failure helps people approach recovery without shame. Knowing the causes and typical timeline can help you set realistic expectations for healing.

How Medical Professionals Assess Diastasis Recti

Before pursuing recovery options, it helps to understand how healthcare providers measure and evaluate diastasis recti. A physical examination is the standard way to assess the condition. A doctor, physical therapist, or specialized pelvic floor therapist will typically have you lie on your back with knees bent and ask you to engage your abdominal muscles by lifting your head slightly or performing a small crunch-like movement. This contraction makes the separated muscles more visible and easier to feel.

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During this assessment, the provider measures three key aspects: the width of the gap (how far apart the muscles are), the depth of the separation (how much the connective tissue has stretched), and the tension or firmness of the tissue in the gap. The width is measured in finger-widths or centimeters. A separation of two finger-widths or less (approximately 1-2 centimeters) is often considered normal or mild. Gaps wider than this may warrant targeted recovery strategies.

Ultrasound imaging can provide additional information about the muscle and tissue quality, though it is not always necessary for diagnosis. Ultrasound can measure the exact width of the gap and assess how well the tissues are healing over time. Some providers use this technology to track progress during recovery, particularly for people with more significant separation or those experiencing complications like pelvic floor dysfunction.

The assessment also typically includes questions about your symptoms and functional concerns. Healthcare providers may ask about back pain, difficulty with certain movements, pelvic floor symptoms like urinary leakage or pelvic pressure, or aesthetic concerns. They may also evaluate your posture, breathing patterns, and how your core muscles engage during daily activities. This information helps determine which recovery approach might work best for your specific situation.

Practical Takeaway: Getting a professional assessment provides objective information about the severity of your separation and helps identify whether your symptoms stem from diastasis recti or other causes. This clarity allows you to pursue targeted strategies rather than generic abdominal exercises that may not suit your situation.

Physical Therapy and Exercise-Based Recovery

Physical therapy is one of the most researched and widely recommended recovery options for diastasis recti. A pelvic floor physical therapist can create a tailored program that addresses not just the abdominal separation but also related issues like pelvic floor dysfunction, posture problems, and movement patterns that may have contributed to or resulted from the condition.

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Effective diastasis recti recovery focuses on specific principles rather than traditional crunches or sit-ups, which can actually worsen the condition by placing excessive pressure on the weakened connective tissue. Instead, physical therapy typically emphasizes:

  • Deep breathing and core activation: Learning to engage your deepest abdominal muscle (the transverse abdominis) through proper breathing techniques. This muscle acts like a corset, helping to stabilize and support the separation without creating excessive intra-abdominal pressure.
  • Progressive exercises: Starting with gentle movements and gradually increasing difficulty as the connective tissue strengthens and the muscles regain function.
  • Functional movement retraining: Learning how to lift objects, roll out of bed, stand up, and perform other daily activities in ways that protect the healing abdominal wall.
  • Posture correction: Addressing postural habits that may place unnecessary strain on the abdominal muscles and connective tissue.
  • Pelvic floor rehabilitation: Many people with diastasis recti also have pelvic floor dysfunction, which a physical therapist can address through targeted exercises and techniques.

Research on physical therapy outcomes is encouraging. Studies have shown that 12 weeks of targeted physical therapy can significantly reduce the gap width and improve functional strength. One study published in the Journal of Women's Health Physical Therapy found that structured exercise programs resulted in improved core function and reduced symptoms in most participants. The timeline for seeing results typically ranges from 8 to 12 weeks, though some people experience improvement sooner and others require a longer program.

Practical Takeaway: Physical therapy offers a structured, evidence-based approach to recovery that addresses both the gap itself and related symptoms. Working with a trained therapist helps ensure you perform exercises correctly, which maximizes results and prevents further injury.

Non-Exercise Recovery Strategies and Lifestyle Modifications

While exercise is important, diastasis recti recovery also involves everyday habits and lifestyle adjustments that support healing. These strategies work alongside physical therapy or other treatments to reduce strain on the abdominal wall and promote tissue recovery.

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Posture and body mechanics play a significant role in recovery. Poor posture—such as slouching or excessive forward bending—places continuous stress on the separated abdominal muscles and weakened connective tissue. Maintaining good posture means keeping your shoulders back, your spine in a neutral position, and your core gently engaged. When bending or lifting, using proper body mechanics prevents the abdominal wall from bulging outward under pressure. For example, instead of bending at the waist, bend at your knees and hips while keeping your torso upright.

Breathing techniques may seem simple, but they significantly impact recovery. Many people develop shallow, chest-only breathing patterns that fail to engage the deep abdominal muscles. Learning diaphragmatic breathing—using your diaphragm to draw air deep into your lungs—allows the transverse abdominis muscle to work properly. During this type of breathing, your belly expands slightly as your diaphragm contracts. Practicing this pattern for 5-10 minutes daily can improve core function without the intensity of exercise.

Activity modification involves avoiding or modifying movements that place excessive stress on the healing abdominal wall. High-impact activities, heavy lifting, intense abdominal exercises, and certain yoga poses may worsen diastasis recti if done before adequate healing occurs. This doesn't mean complete rest—gentle walking, swimming (after clearance from your healthcare provider), and modified strength training are typically well-tolerated. Over time, as the gap closes and tissue strengthens, more activities become possible.

Supportive garments such as abdominal braces or compression bands may provide relief during recovery. These devices offer external support to the abdominal wall, potentially reducing discomfort and allowing for more comfortable participation in daily activities. However, garments should not