EDS vs. Hypermobility: What's the Difference, and Why Does Your Pelvic Floor Care?
If you've ever been told you're "double-jointed," bruise easily, or have joints that seem to slip out of place more than they should, you may have wondered whether you have Ehlers-Danlos Syndrome (EDS), Hypermobility Spectrum Disorder (HSD), or just naturally flexible joints. These terms get used interchangeably online, but they're not the same thing — and the distinction matters, especially when it comes to your pelvic floor.
As a pelvic floor and orthopedic physical therapist, I see this connection often: patients with hypermobile joints frequently also struggle with bladder leakage, pelvic organ prolapse symptoms, pelvic pain, or a pelvic floor that feels like it just can't "hold." Understanding why connective tissue laxity affects the pelvis — not just the knees and shoulders — is the key to treating it effectively.
What Is Joint Hypermobility?
Joint hypermobility simply means your joints move beyond the typical range of motion. Many people are hypermobile and have no symptoms at all — it can even be an advantage in dance, gymnastics, or yoga. Hypermobility becomes a clinical concern when it's accompanied by pain, instability, injuries, or systemic symptoms.
Hypermobility Spectrum Disorder (HSD)
HSD is the diagnosis given when someone has symptomatic joint hypermobility — pain, recurrent subluxations or dislocations, fatigue, or instability — but doesn't meet the full genetic and clinical criteria for a hereditary connective tissue disorder like EDS. HSD sits on a spectrum, and for many patients it's a "not otherwise specified" category: real, often disabling, but without a confirmed underlying diagnosis.
Ehlers-Danlos Syndrome (EDS)
EDS is a group of hereditary connective tissue disorders caused by changes in how the body makes or processes collagen. There are 13 recognized subtypes, most of which are rare and can be confirmed with genetic testing. The exception is hypermobile EDS (hEDS) — the most common subtype — which currently has no identified genetic marker and is diagnosed clinically, based on a combination of:
Generalized joint hypermobility (often measured with the Beighton score)
A personal or family history of soft tissue complications, chronic pain, or systemic features
Ruling out other connective tissue conditions
Because hEDS shares so much overlap with HSD on the surface, distinguishing between the two can be tricky — and honestly, from a treatment standpoint, the day-to-day physical therapy approach is often similar either way.
Similarities Between EDS and HSD
Joint instability and a tendency toward subluxation or dislocation
Chronic musculoskeletal pain, often in multiple regions
Fatigue that's disproportionate to activity level
Poor proprioception (your brain's ability to sense where your joints are in space)
Delayed healing or easy bruising
Frequent overlap with conditions like POTS (postural orthostatic tachycardia syndrome), mast cell activation issues, anxiety, and GI dysmotility
Key Differences
HSD EDS (especially hEDS) Genetic basis Not identified/confirmed Confirmed in 12 of 13 types; hEDS diagnosed clinically Systemic involvement Usually more localized to joints Often broader — skin, vascular, GI, autonomic systems Skin findings Typically minimal Soft, velvety, or hyperextensible skin common Diagnostic criteria Symptom-based, less rigid Formal criteria (2017 International Classification) Prognosis/monitoring Generally joint-focused May require monitoring for vascular or organ involvement depending on subtype
For most patients, especially those without red-flag features like vascular fragility, the practical rehab approach doesn't change dramatically based on which label applies. What matters clinically is recognizing that connective tissue laxity is a whole-body issue — and the pelvic floor is connective tissue too.
The Pelvic Floor Connection
The pelvic floor is a muscular hammock, but it's also richly woven through with fascia, ligaments, and connective tissue that support the bladder, uterus, and rectum. If collagen throughout your body is more elastic or fragile than average, your pelvic support structures are affected right along with your knees and shoulders. This can show up as:
Pelvic organ prolapse. Weaker connective tissue support for the bladder, uterus, or rectum can lead to a sensation of heaviness, bulging, or pressure — sometimes even in younger patients or those who haven't had children.
Stress or urge incontinence. Lax connective tissue around the urethra and bladder neck can reduce the structural support needed for continence, independent of muscle strength alone.
Pelvic pain and dyspareunia (painful intercourse). Joint instability in the sacroiliac joints, pubic symphysis, or hips can refer pain into the pelvis. Additionally, pelvic floor muscles may overwork to compensate for lax ligamentous support, becoming tight, guarded, and painful — a pattern sometimes called "instability masquerading as tightness."
Bowel dysfunction. Rectal prolapse symptoms, straining, or a sense of incomplete emptying can stem from the same connective tissue laxity affecting the rectal support structures.
Sacroiliac and pubic symphysis instability. These joints rely heavily on ligamentous integrity. In hypermobile patients, they can become a significant pain generator that radiates into the pelvic floor.
Why This Changes the Treatment Approach
Standard pelvic floor PT often emphasizes strengthening — and strengthening still matters here. But hypermobile and EDS patients need a modified approach:
Prioritize stability over flexibility. Many hypermobile patients are already very flexible; the goal is building neuromuscular control and joint stability, not increasing range of motion.
Address the whole kinetic chain. Hip, core, and sacroiliac stability directly influence pelvic floor function — treating the pelvic floor in isolation rarely resolves symptoms.
Train proprioception deliberately. Because joint position sense is often impaired, exercises need to rebuild the brain-body feedback loop, not just muscle strength.
Avoid overstretching. Deep stretching, which many hypermobile patients gravitate toward because it "feels good," can actually worsen instability over time.
Pace and pressure-manage. Fatigue, autonomic symptoms (especially with co-occurring POTS), and connective tissue fragility mean rehab needs to be dosed carefully rather than pushed aggressively.
Coordinate care. Because EDS and HSD are whole-body conditions, the most successful outcomes usually involve collaboration between pelvic floor PT, orthopedic PT, and sometimes rheumatology, GI, or cardiology depending on symptom overlap.
The Bottom Line
Whether you carry a formal EDS diagnosis or a working diagnosis of HSD, the message for your pelvic floor is the same: your connective tissue affects more than your joints, and it deserves a treatment approach built around stability, not just strength. If you've been told your pelvic floor issues are "just anxiety" or "just weak muscles" and nothing has helped, hypermobility may be the missing piece of the puzzle.
Kaye Sharp, MPT, WHC, is the owner of Sharp Ortho & Pelvic Physical Therapy in Hoover, AL, specializing in pelvic health, women's health, and orthopedic physical therapy, including care for patients with EDS, HSD, and complex hypermobility presentations. To schedule a consultation, visit sharpphysicaltherapy.com or call 205-515-0258.
