Free Guide to Understanding Diastasis Recti

What Is Diastasis Recti and How Does It Develop

Diastasis recti occurs when the two main abdominal muscles (the rectus abdominis muscles) separate from each other. These muscles run vertically down the front of your abdomen, and they normally sit close together, connected by a band of connective tissue called the linea alba. When diastasis recti develops, this gap widens, and the connective tissue stretches and thins.

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The separation happens gradually in most cases. During pregnancy, the hormone relaxin causes ligaments and connective tissue to loosen, allowing the abdominal wall to expand as the baby grows. The uterus pushes outward on the abdominal muscles, creating pressure that forces them apart. Studies show that approximately 60% of pregnant women develop some degree of diastasis recti by the third trimester. The condition is measured in finger-widths—a gap of more than two to three finger-widths (roughly 1.5 centimeters or more) between the muscles is typically considered clinically significant.

While pregnancy is the most common cause, diastasis recti can also develop from other factors. Rapid weight gain, chronic coughing, heavy lifting, or repeated straining during bowel movements can create abdominal pressure that separates the muscles. Men and non-pregnant individuals can develop this condition too, though it occurs less frequently. Age plays a role as well—the connective tissue becomes less elastic as people get older, making separation more likely after strain or injury.

The condition affects more than just appearance. When the abdominal muscles separate, they cannot function as effectively to support your spine and core. This can lead to lower back pain, poor posture, and reduced stability during movement. Some people experience pain around the separated area or feel a bulge or dome-like protrusion when they engage their abdominal muscles.

Practical takeaway: Diastasis recti is a physical separation of abdominal muscles that develops due to pressure on the abdominal wall. Understanding how it forms helps you recognize whether you might have this condition and why specific recovery approaches matter.

Recognizing the Signs and Symptoms

The most visible sign of diastasis recti is a noticeable gap or bulge down the center of the abdomen. Many people first notice this when they try to sit up or engage their core muscles—a ridge or dome appears along the midline of the belly. This bulging happens because the weakened connective tissue cannot hold the abdominal contents in place effectively. The bulge may be more pronounced when you cough, strain, or perform certain movements.

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Beyond appearance, several physical symptoms may indicate diastasis recti. Lower back pain is one of the most common complaints because the separated abdominal muscles cannot stabilize the spine properly. Without adequate core support, the lower back muscles work harder and become fatigued. Pelvic pain and pain along the midline of the abdomen also occur in some people. Others report a feeling of weakness or instability in the core—difficulty with certain movements, poor balance, or the sensation that something inside is shifting or unsupported.

Some individuals experience pain during sexual activity due to pressure on the abdominal area or weakness in the pelvic floor muscles. Digestive issues, including constipation or bloating, can occur because the weakened abdominal muscles reduce pressure and support in the abdomen. Pelvic floor dysfunction sometimes develops alongside diastasis recti because the muscles of the core work together—weakness in one area affects the others.

It's important to note that many people with mild diastasis recti experience no symptoms at all. The condition is only a medical concern if it causes pain, functional problems, or significant bulging. Some separation of the abdominal muscles is actually normal and may close on its own, especially in the months following pregnancy. The timing, severity, and your individual symptoms determine whether intervention is necessary.

Practical takeaway: Learn to identify the visible and physical signs of diastasis recti so you can describe them accurately to a healthcare provider and understand when symptoms warrant attention.

Understanding Diagnosis and Assessment Methods

A healthcare provider typically diagnoses diastasis recti through a physical examination. During this assessment, you lie on your back and your doctor places their fingers along the midline of your abdomen, just above your belly button. You then lift your head slightly or cough, which engages your abdominal muscles. The provider feels for a gap between the muscles and measures the separation using fingers as a guide. A separation of 1.5 centimeters (about two finger-widths) or more is generally considered meaningful, though some clinicians use different measurement standards.

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The physical exam also assesses the quality of the connective tissue—whether it feels firm or soft, intact or compromised. A provider may check for pain during the examination and ask about your symptoms. They might also assess your posture and how your abdominal muscles engage during different movements. This information helps determine the severity of your condition and whether it's affecting your function.

Ultrasound imaging can provide more detailed information about diastasis recti. Real-time ultrasound allows measurement of the gap between muscles both when relaxed and when engaged. Research published in the journal Ultrasound in Medicine and Biology indicates that ultrasound may reveal separation that a physical exam alone might not detect. Some providers use this imaging to track whether the separation closes over time or to rule out other conditions that might cause similar symptoms.

Self-assessment is also possible, though less reliable than professional evaluation. To check yourself, lie on your back with knees bent and place your fingers along the midline of your abdomen, just above your belly button. Lift your head slightly while keeping your shoulders on the floor—this engages your abdominal muscles. Feel for a gap or bulge. You can repeat this check along your abdomen, from above your belly button down to below it, since the separation may vary in different areas. However, professional assessment provides a more accurate measurement and helps rule out other issues.

Practical takeaway: Know what to expect during a diastasis recti assessment and understand that both physical examination and imaging can provide useful diagnostic information about your condition.

Recovery and Management Strategies

Recovery from diastasis recti requires a focused approach to rebuilding abdominal strength and stability. The goal is to restore function to the abdominal wall and improve the quality of the connective tissue between the separated muscles. For many people, especially those in the early postpartum period, the separation closes naturally with time and appropriate activity. Studies show that up to 35% of women still have diastasis recti at 12 months postpartum, but some additional improvement may continue beyond that timeframe.

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Physical therapy is the primary treatment approach. A physical therapist specializing in pelvic health or postpartum recovery can design a program tailored to your condition. Early exercises typically focus on gentle, controlled abdominal engagement without excessive strain. Transverse abdominis activation—engaging the deepest abdominal muscle layer that wraps around your torso like a corset—is often the starting point. This muscle provides core stability without creating outward pressure that might increase separation. Pelvic floor exercises are frequently incorporated as well, since these muscles work with the abdominal muscles to support your core.

As you progress, exercises gradually incorporate more functional movements—walking, stair climbing, and eventually stronger core work. Movements that increase intra-abdominal pressure, such as crunches, traditional sit-ups, or heavy lifting, are typically avoided early in recovery because they can worsen the separation. High-impact activities like running or intense exercise should be delayed until the abdominal wall has strengthened sufficiently. A physical therapist can determine when you're ready to progress to higher-level activities.

Posture and movement patterns also deserve attention. Poor posture increases pressure on the abdominal wall and stretches the connective tissue further. Maintaining neutral spine alignment—not arching your lower back excessively or rounding your shoulders—reduces strain. When lifting, bending, or rolling out of bed, proper body mechanics matter. Rather than crunching up from a lying position, rolling onto your side first reduces stress on the separated muscles. Breathing properly during movement—avoiding breath-holding, which increases intra-abdominal pressure—supports recovery.

Practical takeaway: Effective recovery focuses on gradual, progressive abdominal strengthening guided by a physical therapist, combined with attention to posture and movement patterns in daily