When Flexibility Turns into Instability and Pain: Understanding Pelvic Torsion, Hypermobility, and Nervous System Threat
- Stefani Wilton
- Mar 2
- 11 min read
Updated: Mar 3
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A Somatic Yoga Therapy Perspective
There was a time in my twenties when my hypermobility was praised. In the yoga spaces I inhabited, my range of motion was used to highlight demonstrations of complex asana. I believed that my flexibility meant I was healthy, but what I didn’t understand was that my increased range of motion was instability in disguise.
Behind my fluidity was a nervous system working constantly to create safety. My joints did not offer clear boundaries, so my muscles created them. My ligaments did not fully contain me, so my system organized around gripping. What looked graceful externally was, internally, a body negotiating instability.
My pelvis began to twist. My left psoas shortened to hold me upright. My rib cage flared to compensate. My spine rotated to keep me facing forward. Tension climbed into my neck and skull. What had once been praised as openness quietly evolved into injury, pain, and a nervous system that constantly perceived a threat to my safety.
In my twenties, I sought support from skilled and thoughtful professionals across multiple disciplines. Most offered insight and contributed meaningfully to my understanding. And yet, some interventions — particularly those focused on increasing flexibility — unintentionally deepened the problem. My already unstable, overly mobile psoas was stretched further in the name of release. This approach left me unstable and more deeply embedded the threat response in my body.
In later years, when I sought support for increasing pain and significant challenges with sleep, I even had a practitioner tell me — with visible frustration — that as a yoga teacher, I “shouldn’t have so much tension.” The implication was that my symptoms were a personal failure. They were not. They were the understandable outcome of a hypermobile system organizing around protection.
Then peri-menopause arrived… Almost overnight, what had once been hypermobile became stiff and restricted. The same joints that had moved too freely now felt bound and inflamed. The gripping intensified. Sleep worsened. The compensatory pattern that had quietly existed for years became undeniable.
It was this lived experience — particularly the intersection of hypermobility, instability, hormonal transition, inflammation, and nervous system threat — that became one of the primary motivators behind my research. What I was experiencing was not a collection of isolated muscular issues. It was an integrated stabilization strategy — my body’s intelligent attempt to create safety in the absence of structural certainty.
The inquiry began long before I had language for it. Somatic Yoga Therapy was formally born in Italy — but its roots were in my own body, years earlier, as I tried to understand the connection between my hypermobile body and my struggling nervous system.
It was not created from theory alone, but from lived experience — years of observation, experimentation, refinement, and integration. I needed an approach that did not merely stretch what felt tight or strengthen what appeared weak, but one that could reorganize pelvic orientation, restore rib cage integrity, reduce inflammatory load, support lymphatic flow, and calm the underlying threat response driving the pattern.
An essential component of this work is the integration of gentle lymphatic support. Chronic torsional patterns often contribute to localized stagnation, low-grade inflammation, and nervous system dysregulation. By incorporating specific breathwork, positional decompression, subtle rhythmic movement, and manual lymphatic stimulation principles, this practice helps reduce inflammatory load while supporting parasympathetic engagement. When inflammation decreases and lymphatic flow improves, neuromuscular reorganization becomes more accessible and sustainable.
Somatic Yoga Therapy is the approach that ultimately resolved this torsional instability within my own body, with wisdom respectfully gleaned from the fields of osteopathic informed massage therapy, yoga therapy, somatics, Ayurveda, Traditional Chinese Medicine, and myofascial research.
The Pelvic and Spinal Pattern
What I eventually came to understand — first in my own body and later in countless clients — is that this presentation reflects a very recognizable compensatory strategy. In postural restoration frameworks, it is often described as a Left AIC (Anterior Interior Chain) pattern. (While less common, some individuals experience the exact opposite with a Right AIC pattern.)
In simple terms, the left psoas becomes a primary driver.
When the left psoas is chronically contracted, it does more than create the sensation of tightness. It begins to organize the pelvis. It can pull the left femur into external (lateral) rotation and draw the left side of the pelvis forward into anterior rotation. Over time, this subtle forward shift sets the stage for a cascading series of adaptations throughout the entire body.
The pelvis is no longer neutral. It is oriented. And once the pelvis orients, everything above it and below it must respond.
In my case, what felt like “tension” was actually a stabilization strategy. The left psoas was not simply short — it was holding me upright in the absence of deeper structural support.
In Somatic Yoga Therapy, addressing this driver is not about aggressively lengthening the psoas. In fact, for hypermobile individuals, further stretching can deepen instability and pain. Instead, we examine how pelvic orientation is influencing respiration, diaphragmatic movement, and lymphatic return — particularly through the deep abdominal and pelvic channels.
When the pelvis tips forward on one side, it alters how the diaphragm descends, how the rib cage expands, and how fluids circulate. This affects not only muscular tone, but also inflammatory load and nervous system regulation.
Through breath re-patterning, subtle positional resets, and gentle oscillatory movement, we restore balanced diaphragmatic motion and create more coherent abdominal pressure. This supports both structural reorganization and fluid regulation. As lymphatic flow improves and the nervous system down-regulates, the psoas no longer has to grip for safety.
The goal is not to force change, which creates a protective response, but to remove the need for compensation by re-establishing a perception of felt safety through gentle re-alignment of the body through the somato-anatomical loops of the feet, shins, thighs, pelvis, ribs, shoulders, and neck.
The Neck, the Occipitals, and the Nervous System
For me, the tension did not stop at the pelvis or even the rib cage. As my spine rotated to compensate for the twisted base below, my head subtly repositioned itself to keep my eyes level with the horizon. I did not understand this at the time. I only knew that my neck never fully relaxed. There was a constant pulling at the base of my skull — a density along the occipital ridge that no amount of stretching seemed to resolve. My left bra strap would always fall off my shoulder.
Over time, I began to study what was happening there. I filmed myself moving from plank pose to four-limbed staff pose (chaturanga dandasana), and I noticed that my left shoulder would collapse as I transitioned toward the floor.
The upper cervical spine — particularly the occipitals and suboccipital muscles — plays a profound role in regulating the nervous system. These small muscles are densely innervated and deeply connected to proprioception, your body’s sense of where it is in space. They interface with the dura mater, influence the cranial nerves, and communicate directly with the vestibular system. When they remain in chronic contraction, the nervous system interprets it as instability.
In a body already negotiating hypermobility and pelvic torsion, the head must work harder to maintain orientation. The suboccipitals engage continuously to stabilize visual focus and balance. The vestibular system remains subtly vigilant. The eyes strain to maintain horizontal tracking. Beyond neck tension, this triggers a low-grade neurological alarm. In my own experience, this is where sleep began to unravel.
When the upper cervical spine remains braced, sympathetic tone increases. The system struggles to down-regulate. The body does not fully trust that it is supported. For hypermobile individuals — particularly during peri-menopause, when hormonal shifts alter connective tissue integrity and nervous system sensitivity — this effect can intensify dramatically – leading to fluidity becoming stiffness and mobility becoming restriction.
When the pelvis twists, the rib cage compensates, the spine rotates, the head counterbalances, and the shoulders, legs, and feet move into further compensatory patterns. This all causes the nervous system to stay on alert.
In Somatic Yoga Therapy, I learned that the neck cannot truly soften until the base below it reorganizes. So, we begin with pelvic orientation. Then we restore rib cage mechanics. Then we improve diaphragmatic movement and support lymphatic flow. As inflammatory load reduces and structural coherence returns, the upper cervical region no longer needs to brace for stability. This is when gentle cranial-fascial decompression and suboccipital softening become effective. (For clients who have not responded to cranio-sacral work, I believe that this complex underlying issue is the reason why.)
This creates its own chain reaction, where the pelvis stabilizes, allowing the neck to soften, which allows the vestibular system to settle, and then the nervous system can down-regulate.
Impacts on the Lower Body
Physiologically, when the left psoas contracts and draws the pelvis into anterior rotation on one side, the femur does not simply rotate outward — it changes how force moves through the entire lower body. The hip joint loses its centered orientation. The acetabulum and femoral head no longer articulate in balanced load, and the anterior adductors along your upper inner thigh take on the job of hip flexion, leaving them overly stretched and painful.
In my own body, this pattern emerged gradually. My left leg began externally rotating, and I shifted more weight into my left heel. My right sacro-iliac joint became unstable and painful, and tension developed along my lateral hip and outer thigh. My husband once noted that when I ran, my left leg moved like an eggbeater — a description that was both accurate and humbling.
As the torsion persisted, the imbalance traveled downward. My right hip struggled to stabilize; the gluteus medius could not consistently anchor me, and the right quadratus lumborum shortened in compensation. Over time, this created a “hiked” right hip, moderate functional scoliosis in my lumbar spine, and a leg length discrepancy that affected my gait.
The deep hip rotators alternated between gripping and fatigue. My adductors lost their balanced partnership — the left lengthening and straining to assist with hip flexion, the right shortening and further driving the asymmetry. Even my pelvic floor oscillated between holding and weakness.
Eventually, the compensation reached my feet. My left foot rotated outward and loaded into the lateral ankle, while my right arch subtly collapsed, shifting between pronation and bearing weight through the lesser toes. This altered load pattern fed back into my sacro-iliac joint, amplifying the dysfunction above.
Hypermobility complicates this further.
When connective tissue is inherently lax, the body relies more heavily on muscular co-contraction for stability. If one side of the pelvis is rotated forward and the other backward, the lower extremities must absorb asymmetrical load with every step. This can lead to: sacro-iliac dysfunction and localized pain, chronic hip tightness despite high flexibility, knee tracking changes, ankle instability and pain, and subtle changes in gait mechanics.
In peri-menopause, when hormonal shifts alter collagen integrity and fluid regulation, this lower-body pattern can intensify. What was once hypermobile becomes inflamed and restricted. The muscles that were gripping to create stability become fatigued. The joints that once felt loose begin to feel compressed.
In Somatic Yoga Therapy, lower-body reorganization is not about strengthening in isolation. It is about restoring pelvic neutrality first, then reestablishing balanced load through the hips, adductors, and deep abdominal system. Gentle lymphatic support becomes particularly important here, as pelvic torsion can reduce efficient fluid return through the inguinal and deep pelvic channels.
As pressure normalizes and asymmetrical load decreases, the lower body no longer needs to brace so aggressively, which allows the pelvis to become less twisted, the hips to become more centered, and the feet to ground properly. The entire system begins to reorganize from the ground up.
Bringing the Pattern Together
Over time, what felt confusing and unrelated in my body revealed itself as a coherent strategy. What appeared to be separate symptoms — hip tension, subtle backward rotation through one side of the pelvis, hip pain and instability, ankle pain, sacro-iliac dysfunction and pain, rib gripping, neck tension, sleep disruption — were not isolated problems. They were coordinated responses to a dominant pelvic orientation.
From a Somatic Yoga Therapy perspective, these patterns are not simply mechanical misalignments; they are lived adaptations. The body organizes itself around tension, safety, orientation, inflammatory load, and habitual movement strategies.
What presents as isolated discomfort is often a coordinated pattern of compensation extending from the pelvis to the rib cage and then to the neck and cranium.
Understanding the pattern is the first step. From there, therapeutic intervention can focus not on forceful correction, but on restoring balanced engagement, re-establishing rib-pelvis integration, supporting lymphatic flow, reducing inflammation, and gently reorganizing neuromuscular coordination within a regulated nervous system.
The body is rarely dysfunctional in isolation. It is adaptive. And when we learn to read its compensations clearly—structurally, neurologically, and fluidly—we can begin to guide it back toward coherence.
Research and Clinical Foundations
This blog reflects a heuristic inquiry — an integration of lived experience, sustained self-study, clinical observation, and interdisciplinary research that ultimately contributed to the development of Somatic Yoga Therapy. The following research supports key elements discussed in this writing, including hypermobility, sacroiliac dysfunction, cervical neuromuscular regulation, and the relationship between connective tissue, nervous system tone, and sleep. These studies support what many hypermobile individuals experience firsthand: when structural instability meets nervous system vigilance, the body organizes around protection. As a therapist who primarily supports women who are neurodivergent, I feel it is important to add that hypermobility is often a comorbidity for such individuals.
1. Hypermobility, Instability, and Pain
Castori, M., Tinkle, B., Levy, H., et al. (2017). A framework for the classification of joint hypermobility and related conditions. American Journal of Medical Genetics Part C: Seminars in Medical Genetics, 175(1), 148–157.
Annotation: This paper outlines the clinical framework for understanding generalized joint hypermobility and its associated syndromes. The authors emphasize that hypermobility is not merely increased flexibility but often involves connective tissue laxity, chronic pain, autonomic dysfunction, sleep disturbance, and proprioceptive challenges. The research supports the concept that hypermobile individuals frequently develop compensatory muscular bracing patterns in response to structural instability — a core principle discussed in this article.
2. Sacroiliac Dysfunction and Pelvic Torsion
Vleeming, A., Schuenke, M. D., Masi, A. T., et al. (2012). The sacroiliac joint: An overview of its anatomy, function, and potential clinical implications. Journal of Anatomy, 221(6), 537–567.
Annotation: This comprehensive review explores sacroiliac joint biomechanics and the concept of “force closure” — the muscular and fascial systems that stabilize the pelvis in the absence of passive ligamentous integrity. The authors describe how altered pelvic orientation and asymmetrical loading can contribute to sacroiliac pain and dysfunction. This aligns with the torsional pelvic compensation described in the blog, particularly in hypermobile individuals who rely more heavily on muscular stabilization strategies.
3. Suboccipital Tension, Proprioception, and Nervous System Regulation
Treleaven, J. (2008). Sensorimotor disturbances in neck disorders affecting postural stability, head and eye movement control. Manual Therapy, 13(1), 2–11.
Annotation: This research examines the relationship between cervical muscle dysfunction, vestibular processing, eye movement control, and postural regulation. The findings demonstrate that upper cervical tension can influence proprioception, visual tracking, balance, and autonomic tone. These mechanisms help explain how chronic suboccipital contraction may contribute to nervous system vigilance and sleep disturbance — particularly in individuals already compensating for pelvic asymmetry and instability.
4. Hypermobility, Hormonal Shifts, and Midlife Changes
Carley, M. E., & Schaffer, J. (2000). Urinary incontinence and pelvic organ prolapse in women with Marfan or Ehlers-Danlos syndrome. American Journal of Obstetrics and Gynecology, 182(5), 1021–1023.
Annotation: This study highlights the impact of connective tissue laxity on pelvic stability and dysfunction, particularly in women with hereditary connective tissue disorders. While focused on specific syndromes, the findings support broader clinical observations that ligamentous laxity combined with hormonal shifts — including those occurring during peri-menopause — can significantly alter pelvic support and musculoskeletal stability. Estrogen fluctuations are known to influence collagen integrity and joint stability, helping explain why hypermobile individuals may transition from excessive mobility to pain, stiffness, and inflammatory restriction during midlife.
Additional Supporting Review:
Chidi-Ogbolu, N., & Baar, K. (2019). Effect of estrogen on musculoskeletal performance and injury risk. Frontiers in Physiology, 9, 1834.
Annotation: This review discusses how estrogen directly affects collagen metabolism, ligament stiffness, tendon integrity, and injury susceptibility. Fluctuating or declining estrogen levels — as seen in peri-menopause — alter connective tissue behavior and joint stability. This provides physiological support for the lived experience described in the article: what was once hypermobile can become restricted and inflamed as hormonal regulation shifts.
5. Lymphatic Flow, Inflammation, and Nervous System Regulation
Louveau, A., Smirnov, I., Keyes, T. J., et al. (2015). Structural and functional features of central nervous system lymphatic vessels. Nature, 523(7560), 337–341. https://doi.org/10.1038/nature14432
Annotation: This landmark study identified functional lymphatic vessels in the central nervous system, fundamentally reshaping our understanding of fluid regulation, immune signaling, and inflammation in the brain. The findings support the concept that lymphatic flow is intimately connected to neurological health and inflammatory load. Impaired fluid movement may influence sleep quality, cognitive function, and autonomic regulation — themes directly relevant to chronic tension patterns and nervous system vigilance.
Complementary Research:
Scallan, J. P., Zawieja, S. D., & Zawieja, D. C. (2016). Lymphatic transport: The forgotten circulation. Physiological Reviews, 96(2), 1059–110
Annotation: This comprehensive review describes the mechanics of lymphatic transport, its dependence on tissue movement, diaphragmatic pressure changes, and muscular oscillation. The authors emphasize the role of movement and pressure gradients in supporting lymphatic return and reducing inflammatory burden. These mechanisms support the therapeutic rationale for incorporating breathwork, positional decompression, and gentle rhythmic motion within Somatic Yoga Therapy to enhance fluid regulation and reduce chronic inflammatory signaling.
These studies support what many hypermobile individuals experience firsthand: when structural instability meets nervous system vigilance, the body organizes around protection. Sustainable change requires more than stretching — it requires reorganization.