Endometriosis, Pressure and the Breath
A uterus image created in flowers
Endometriosis is not simply a reproductive condition. It is a whole-body inflammatory and neurological experience.
It is defined by the presence of endometrium-like tissue outside the uterus, most commonly on the ovaries, uterosacral ligaments, pelvic peritoneum and bowel. In some cases it is also found on the diaphragm. Research has consistently shown that it is associated with chronic pelvic pain, dyspareunia, painful defecation, bladder symptoms and fatigue. The European Society of Human Reproduction and Embryology and multiple systematic reviews describe endometriosis as a chronic inflammatory condition with both peripheral and central sensitisation components (which means, the tissue itself becomes sensitive and the nervous system becomes more reactive to those signals)..
That language really matters, because we know that when pain becomes persistent, the nervous system changes. Studies on chronic pelvic pain demonstrate altered pain processing and increased central sensitisation. In simple terms, the system becomes protective and hyper-alert. Muscles around the pelvis, particularly the pelvic floor, often increase resting tone. This has been documented in women with endometriosis and chronic pelvic pain who show higher pelvic floor muscle activity and reduced relaxation capacity compared with pain-free controls.
So although many women are told to strengthen, what is frequently present is overactivity, altered coordination and also guarding.
This is where breath and pressure regulation and Hypopressives gracefully enter the conversation.
The diaphragm and pelvic floor as a pressure system
The diaphragm and pelvic floor form the top and bottom of the abdominal canister. Their movement is coordinated through changes in intra-abdominal pressure. When the diaphragm descends during inhalation, pressure increases within the abdominal cavity and the pelvic floor lengthens in response. On exhalation, the diaphragm recoils and the pelvic floor gently lifts.
This relationship has been confirmed through ultrasound and electromyography studies showing synchronous activity between the respiratory diaphragm, transverse abdominis and pelvic floor. When breathing is restricted or paradoxical, that coordination changes.
In women with chronic pain, including endometriosis, breathing patterns often shift towards upper chest dominance, reduced rib mobility and breath holding. Pain neuroscience literature shows us that chronic pain is associated with altered respiratory patterns and reduced diaphragm excursion. Reduced diaphragm movement affects the pressure distribution and may also contribute to persistent pelvic floor guarding.
Brilliantly lateral costal 3D breathing directly addresses this. Instead of just pushing the abdomen forward, the focus is on expanding the lower ribs laterally and posteriorly. Then, with awareness, the abdominal wall all the way round also widens and thus the pelvic floor moves into extension.. Studies examining thoracic mobility and respiratory mechanics demonstrate that lateral rib expansion improves diaphragm excursion and reduces accessory muscle overuse. Improved rib mobility also correlates with better trunk stability and reduced spinal loading.
From a pressure perspective, when the ribs expand circumferentially, intra-abdominal pressure distributes more evenly. This reduces focused downward strain through the pelvic outlet. For someone with endometriosis who experiences pelvic heaviness or pain during ovulation or menstruation, this redistribution can feel pretty significant.
Hypopressives and intra-abdominal pressure
Hypopressive techniques were originally developed within the field of pelvic rehabilitation. Early research from Caufriez and later European pelvic health groups examined the effect of hypopressive apnoea on pelvic floor activation and intra-abdominal pressure. Some small trials demonstrated reductions in resting pelvic floor overactivity and improvements in pelvic floor endurance following a hypopressive programme.
While the body of research is still developing and larger high-quality trials are needed, existing studies suggest that correctly performed hypopressive techniques reduce excessive intra-abdominal pressure compared with traditional abdominal bracing. Imaging studies have also shown reflexive activation of deep abdominal muscles, particularly transverse abdominis, during the apnoea phase.
For women with endometriosis who often present with pelvic floor overactivity, the goal is not maximal contraction. It is improved coordination and pressure modulation. Hypopressives emphasise axial elongation, rib expansion and reflexive engagement rather than voluntary gripping or squeezing. That distinction aligns with current pelvic pain guidelines, which recommend down-training and coordination before strengthening in cases of hypertonicity.
The nervous system and pain modulation
Breath regulation is one of the most accessible tools we have for influencing the autonomic nervous system. Slow, controlled breathing at approximately five to six breaths per minute has been shown to increase vagal tone and heart rate variability. Higher vagal tone is associated with improved stress resilience and reduced pain perception.
Chronic pelvic pain studies demonstrate that autonomic dysregulation is common in those with endometriosis. When breath becomes slower and more laterally directed, it can reduce sympathetic dominance. This does not remove endometriosis lesions, but it may reduce the amplification of pain signals.
There is also emerging evidence linking diaphragm mobility with emotional regulation and core stability. Fascial continuity between the diaphragm, psoas and pelvic floor suggests that improving rib and diaphragm movement influences tension patterns throughout the pelvis.
What this means in practice
For someone living with endometriosis, a breath-led approach begins with restoring rib mobility and reducing protective tension. In a semi-supine position, hands placed around the lower ribs, the inhale is directed into the sides and back of the ribcage. The jaw remains soft. The abdomen is not pushed forward aggressively, it is allowed to expand gently all the way around in conjunction with the movement of the ribs. On the exhale, the ribs soften inward and the pelvic floor responds reflexively rather than being consciously squeezed.
Once this coordination is established, gentle hypopressive work can be introduced in supported positions. The emphasis remains on elongation, rib expansion and a controlled, short apnoea. The intention is to improve pressure regulation and deep core reflexes without increasing downward strain.
It is important to be clear that Hypopressives are not a cure for endometriosis. Endometriosis often requires multidisciplinary care including medical management, surgical input where appropriate and specialist pelvic physiotherapy. However, breathing and pressure management sit alongside these interventions as a modifiable, evidence-informed support strategy.
A more integrated way forward
The science around endometriosis increasingly recognises it as a systemic inflammatory and neurological condition rather than a purely gynaecological one. Research into chronic pelvic pain supports the role of central sensitisation, autonomic imbalance and muscular guarding. Respiratory science confirms the mechanical and also neurological link between the diaphragm and pelvic floor. Early pelvic rehabilitation research suggests hypopressive techniques influence pressure and coordination in a positive way.
When we bring these threads together, the rationale becomes super clear. Improving rib mobility and diaphragm function enhances pressure distribution. Enhancing autonomic regulation can also reduce pain amplification and supporting reflexive deep core coordination reduces unnecessary pelvic floor gripping.
This is not about forcing the body. It is about restoring its natural rhythm.
For women with endometriosis, that rhythm can be deeply reassuring. The ribs widen, the diaphragm moves, the pelvic floor softens and lifts in response. The nervous system receives a different signal, not danger and threat but one of safety and release.
If you are navigating endometriosis and are curious about a this breath-led approach that respects both science and lived experience, this is work we can explore carefully and progressively, always guided by symptoms and in collaboration with your wider care team if necessary.
Endometriosis, Breath and Pelvic Function: Key Facts
Endometriosis affects approximately one in ten women of reproductive age, according to global prevalence data published in leading reproductive medicine journals. It is now recognised as a chronic inflammatory condition that often involves both peripheral tissue irritation and central nervous system sensitisation.
Research on chronic pelvic pain populations shows that many women demonstrate increased resting pelvic floor muscle tone and reduced relaxation capacity. This means the issue is frequently overactivity and poor coordination rather than simple weakness.
Ultrasound and electromyography studies confirm that the diaphragm and pelvic floor move in coordination during normal breathing. When breathing becomes shallow or rib mobility is restricted, this coordination changes, altering intra-abdominal pressure patterns.
Slow, controlled breathing has been shown in autonomic research to increase vagal tone and improve heart rate variability. Improved vagal tone is associated with better stress regulation and can influence pain perception.
Early clinical studies investigating hypopressive techniques suggest they actually reduce excessive intra-abdominal pressure and promote reflexive deep abdominal activation, although larger, high-quality trials are still needed.
Taken together, current science supports the idea that restoring rib mobility, improving diaphragm excursion and reducing pelvic floor overactivity are logical, evidence-informed components of a whole-body management strategy for women living with endometriosis.
Research and Clinical References
Global prevalence data indicating that endometriosis affects around one in ten women of reproductive age has been reported in large epidemiological analyses, including Zondervan et al., The Lancet (2018).
The European Society of Human Reproduction and Embryology guideline on endometriosis, Becker et al. (2022), recognises endometriosis as a chronic inflammatory condition frequently associated with central sensitisation and persistent pain mechanisms.
Research into chronic pelvic pain populations has demonstrated increased pelvic floor muscle tone and impaired relaxation in women with pelvic pain conditions, including endometriosis. See Tu et al., American Journal of Obstetrics and Gynecology (2008), and Morin et al., Pain Research and Management (2017).
The coordinated activity between the respiratory diaphragm and pelvic floor during breathing has been demonstrated using ultrasound and electromyography in studies such as Hodges et al., Journal of Physiology (2007), and Kolar et al., Journal of Applied Physiology (2012).
Evidence supporting slow breathing for autonomic regulation and increased vagal tone can be found in Lehrer and Gevirtz, Frontiers in Psychology (2014), and Shaffer and Ginsberg, Frontiers in Public Health (2017).
Early clinical research examining hypopressive techniques and pelvic floor function includes work by Caufriez (1997 onwards) and more recent small trials such as Rial et al., Neurourology and Urodynamics (2015), which suggest potential improvements in pelvic floor activation patterns and pressure management, though further large-scale research is needed.
If you would like to explore Hypopressives with me Yes
