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Abdominal muscle separation (Diastasis Recti)

Introduction

Pregnancy and childbirth bring about profound changes in a woman's body—some visible, some less so. One common but often overlooked postpartum condition is abdominal muscle separation, known medically as diastasis recti. This condition affects the integrity of the abdominal wall and can lead to a protruding belly, core weakness, and even back pain long after delivery.

While diastasis recti is most frequently associated with pregnancy, it can affect anyone, including men and non-pregnant women. Fortunately, with appropriate assessment and targeted treatments, many people can regain core strength and reduce the separation.

This article explores the causes, symptoms, risk factors, and treatment options for diastasis recti, including safe exercises that support recovery.

Abdominal muscle separation (Diastasis Recti) treatment in Singapore
Abdominal muscle separation (Diastasis Recti) treatment in Singapore

What Is Abdominal Muscle Separation (Diastasis Recti)?

Diastasis recti occurs when the two parallel muscles of the abdomen—the rectus abdominis muscles—become stretched and separated along the linea alba, the connective tissue that runs down the midline of the abdomen.

Under normal circumstances, the linea alba provides tension and support to keep the abdominal wall intact. But during pregnancy, the connective tissue can become weakened and thinned, leading to a visible gap or bulge between the muscles. A gap wider than 2.7 cm (about 1 inch) is typically considered diastasis recti.

Abdominal wall separation (Diastasis recti)
Abdominal wall separation (Diastasis recti)
Types of diastasis recti
Types of diastasis recti

Symptoms of Abdominal Muscle Separation (Diastasis Recti)

The signs of diastasis recti can vary in severity but commonly include:

  • A visible bulge or dome in the middle of the abdomen, especially when straining or getting up from lying down
  • Core weakness or instability
  • Lower back pain
  • Poor posture
  • Pelvic floor dysfunction, such as urinary incontinence
  • Digestive issues like bloating or constipation
  • A sensation of "looseness" or lack of support in the abdominal area

In some cases, diastasis recti is purely cosmetic. However, for many, it affects functional movement and quality of life.

How Pregnancy Causes Abdominal Muscle Separation

During pregnancy, several factors contribute to diastasis recti:

  1. Uterine expansion: As the uterus grows, it stretches the abdominal muscles to accommodate the baby.
  2. Hormonal changes: Pregnancy hormones like relaxin and progesterone soften connective tissue, making the linea alba more prone to stretching.
  3. Increased intra-abdominal pressure: The growing baby and shifting organs exert pressure on the abdominal wall.
  4. Repeated strain: Activities like sitting up from bed, poor lifting technique, or excessive core exercises during pregnancy can exacerbate separation.

Diastasis recti often becomes more noticeable in the third trimester and postpartum when the abdomen begins to deflate and the muscles are left unsupported.

Risk Factors for Abdominal Muscle Separation (Diastasis Recti)

Several factors can increase the likelihood of developing diastasis recti:

  • Multiple pregnancies, especially in close succession
  • Carrying multiples (twins or more)
  • High birth weight babies
  • Maternal age over 35
  • Excessive weight gain during pregnancy
  • Weak core muscles pre-pregnancy
  • Heavy lifting or intense abdominal workouts during pregnancy
  • Genetic predisposition to connective tissue weakness
  • C-section delivery (although diastasis can occur regardless of delivery method)

Men and non-pregnant women can also develop diastasis recti from obesity, poor posture, improper lifting, or abdominal trauma.

Treatments for Abdominal Muscle Separation (Diastasis Recti) – Overview

Diastasis recti can be managed and often improved with non-surgical interventions, particularly in the early postpartum months. Treatment options include:

  1. Targeted physical therapy with core-stabilising exercises
  2. Abdominal binders or compression garments
  3. Electromagnetic muscle stimulation
  4. Surgery (Abdominoplasty)
Abdominal wall separation (Diastasis Recti) and loose abdominal skin after pregnancy
Abdominal wall separation (Diastasis Recti) and loose abdominal skin after pregnancy

Exercises for Abdominal Muscle Separation (Diastasis Recti)

Exercise is the cornerstone of non-surgical treatment for diastasis recti. However, not all abdominal workouts are safe—traditional crunches, sit-ups, planks, and heavy lifting can worsen the separation.

Safe and effective exercises focus on engaging the deep core muscles, especially the transverse abdominis, which acts like a corset for your midsection.

Foundational Exercises:

  1. Abdominal Drawing In / Transverse Abdominis Activation
    • Lie on your back with your knees bent.
    • Inhale deeply, then exhale and draw your navel toward your spine.
    • Hold for 5–10 seconds while breathing gently.
    • Repeat 10–15 times.
  2. Pelvic Tilts
    • Lie on your back with knees bent.
    • Flatten your lower back into the floor by tilting your pelvis upward.
    • Hold and release for 10 repetitions.
  3. Heel Slides
    • While lying on your back, engage your core and slowly slide one heel forward.
    • Maintain abdominal control and avoid bulging.
  4. Modified Side Planks and Bird Dog
    • Once strength improves, progress to gentle functional movements that engage the entire core without straining the midline.

Exercises to Avoid:

  • Sit-ups or crunches
  • Front planks (until healed)
  • Leg raises or double leg lifts
  • Bicycle crunches
  • Oblique twists with resistance

Other Non-Surgical Treatments

1. Abdominal Binders and Compression Garments

Wearing supportive garments may help:

  • Improve posture
  • Provide gentle pressure to assist abdominal healing
  • Reduce discomfort, especially in the early postpartum period

However, binders should not replace active rehabilitation and must be used with guidance to prevent over-reliance.

2. Breathwork and Postural Alignment

Correct breathing patterns—particularly diaphragmatic breathing—and good posture are critical for core rehabilitation. Poor breathing mechanics and slouched posture can increase intra-abdominal pressure and worsen diastasis.

3. Electromagnetic muscle stimulation

Electromagnetic muscle stimulation (EMS) uses high-intensity focused electromagnetic (HIFEM) technology to induce supramaximal muscle contractions—far stronger than what you could achieve voluntarily during a workout. These contractions help:

  • Strengthen and tone muscles
  • Build muscle mass
  • Improve neuromuscular coordination

Electromagnetic Muscle Stimulation (EMS) devices like Baysculpt deliver 24,000 contractions in a single 30-minute session, targeting muscle groups like the abdominals, buttocks, arms, and thighs.

A study published in Lasers in Surgery and Medicine (2020) found that Electromagnetic Muscle Stimulation reduced abdominal separation by an average of 11% after 4 sessions over 2 weeks, with participants also showing improved core strength and muscle tone. MRI and ultrasound imaging have demonstrated increased rectus abdominis muscle thickness post-treatment.

Benefits of Electromagnetic muscle stimulation for abdominal wall separation (Diastasis recti) include:

1) Non-invasive, no downtime

2) Painless (slightly uncomfortable only)

3) Increase core muscle strength and size4) Useful for people who are unable to perform exercises due to injury or pain

When Is Surgery Needed for Diastasis Recti?

In cases where conservative treatment fails—especially after 12 months postpartum—surgery may be considered. When the degree of diastasis recti is large (4-5cm) or there is a hernia (protrusion of intestines), surgery is medically required.

Abdominoplasty (Tummy Tuck) with Muscle Repair

  • Performed by a plastic surgeon
  • Involves suturing the rectus abdominis muscles back together
  • Often combined with skin and fat removal for functional and cosmetic benefits

Candidacy:

  • Severe separation (>5 cm)
  • Associated hernia
  • Chronic pain or functional impairment
  • No further pregnancies planned

Downsides:

  • Invasive and requires recovery time
  • Not typically covered by insurance unless medically necessary
Medical Director of Bay Aesthetics Clinic, Dr Hoe Ying Min
Medical Director of Bay Aesthetics Clinic, Dr Hoe Ying Min

Conclusion

Diastasis recti is a common condition that can impact core strength, posture, and body image, especially after pregnancy. Fortunately, with early detection, proper education, and evidence-based treatments, many people can recover without surgery.

If you suspect you have diastasis recti, consider consulting an experienced doctor. At Bay Aesthetics Clinic, Medical Director Dr Hoe Ying Min has helped hundreds of women with their postpartum issues. As a working mother herself, she deeply understands her patients and provides dedicated and personalised care.

Contact us to begin your postpartum journey of restoration and healing.

With over 10 years of experience in aesthetic treatments, Dr Hoe Ying Min serves as the Medical Director at Bay Aesthetics Clinic. She has extensive hands-on experience in lasers, injectables, body-shaping and skin-rejuvenation procedures, and is known for her careful, personalised approach that aims for natural-looking outcomes.

Bay Aesthetics Clinic and Medispa is a doctor-led clinic located in the Marina Bay Financial Centre that delivers medical aesthetics and medispa treatments in a calm, professional setting. With a focus on safety, visible results and accessibility, the team uses only US FDA and HSA-approved technology, applies a holistic view to beauty and wellness, and avoids hard-selling or pressure tactics.

Open from 11 am daily (until 8 pm Mon-Fri; 6 pm Sat/Sun) and conveniently situated within walking distance of two MRT stations

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