Can habitually clenching abdominal (ab) muscles cause rib flares?

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Last updated: June 22, 2025View editorial policy

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From the Research

Habitually clenching abdominal muscles can potentially contribute to rib flares, as it may create muscular imbalances in the core that affect the position of the ribcage. Rib flaring occurs when the lower ribs protrude outward instead of lying flat against the torso. When someone constantly engages their abdominal muscles, especially with improper technique, it can create muscular imbalances in the core. These imbalances may affect the position of the ribcage, particularly if the person is overactivating the upper abdominals while neglecting the deeper transverse abdominis and obliques. This pattern can pull the ribcage into an elevated position, causing the lower ribs to flare outward.

Some key points to consider:

  • The relationship between abdominal muscle clenching and rib flares is not directly addressed in the provided studies, but the concept of muscular imbalances and their impact on the ribcage is relevant 1.
  • Slipping rib syndrome, which involves hypermobility of the false ribs, can cause abdominal and chest pain, and may be related to the issue of rib flares 2, 3.
  • The most recent and highest quality study on the topic of slipping rib syndrome, which may be related to rib flares, was published in 2020 and highlights the importance of a thorough clinical examination and knowledge of the syndrome to diagnose and treat patients' symptoms 3.

To address the issue of rib flares, it is recommended to:

  • Focus on balanced core strengthening that includes all abdominal muscles
  • Practice proper breathing techniques
  • Develop postural awareness
  • Work with a physical therapist or qualified fitness professional to correct patterns and reduce rib flaring.

References

Research

Rib cage mechanics during quiet breathing and exercise in humans.

Journal of applied physiology (Bethesda, Md. : 1985), 1997

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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