Populations and Risk Factors
- Age 40 to 65; more common in females (60–70% of cases)
- Diabetes mellitus is the strongest association — prevalence in diabetic patients is 10–36%, and diabetic patients have 2–4 times higher risk (Magee & Manske, 2021)
- Hypothyroidism, hyperthyroidism, hyperlipidemia, cardiac disease
- Post-immobilization (fracture, stroke, rotator cuff repair, mastectomy)
- Secondary adhesive capsulitis: follows rotator cuff tendinopathy, bicipital tendinitis, labral injury, subacromial impingement, or any painful shoulder condition that limits movement
- Dupuytren contracture association — both share abnormal collagen fiber quality (Rattray & Ludwig, 2000)
- Contralateral shoulder involvement in 20–30% of cases; recurrence in the same shoulder is rare
Causes and Pathophysiology
- Primary (idiopathic): insidious onset with no clear precipitating event; possibly autoimmune or neuroendocrine in origin
- Secondary: develops following pain, restricted motion, or immobilization from another condition (trauma, surgery, rotator cuff injury)
- Pathological sequence:
- Synovial inflammation and increased vascularity (early freezing)
- Fibroblast proliferation and type I/III collagen deposition in the capsule
- Capsular thickening, particularly in the axillary fold and rotator interval
- Dense adhesions form between the capsule and humeral head
- Progressive loss of normal capsular recesses and joint volume (reduced from ~30 mL to 5–10 mL)
- Subscapularis recess and inferior capsular pouch are earliest and most severely affected
- Myofibroblast activity (similar to Dupuytren contracture) drives capsular contraction
- Subacromial bursa may become involved secondarily
Three Stages of Adhesive Capsulitis
| Stage | Duration | Primary Feature | Pain | ROM | Pathology |
|---|---|---|---|---|---|
| Stage 1: Freezing | 0–9 months | Progressive pain | Severe, night pain, pain at rest and with movement | Gradually decreasing, ER lost first | Synovial inflammation, early fibrosis, increased vascularity |
| Stage 2: Frozen | 4–12 months | Stiffness predominates | Pain decreases, occurs mainly at end-range | Severely restricted in capsular pattern | Dense fibrosis, thickened capsule, minimal inflammation |
| Stage 3: Thawing | 12–36 months | Gradual recovery | Minimal pain | Slowly improving, ER recovers last | Capsular remodeling, gradual resolution of fibrosis |
Signs and Symptoms
- Pain: intense, deep, and aching; often disproportionate to observable pathology; night pain disrupting sleep is characteristic of Stage 1
- Capsular pattern of restriction: external rotation most limited > abduction > internal rotation — the hallmark finding
- Loss of both active AND passive ROM — distinguishes capsulitis from rotator cuff pathology (where AROM is limited but PROM may be preserved)
- "Shrug sign": shoulder hiking to compensate for lost glenohumeral motion (reversed scapulohumeral rhythm)
- Rapid disuse atrophy of rotator cuff muscles, particularly supraspinatus and infraspinatus
- Unable to reach behind back (IR + extension), comb hair (ER + abduction), or fasten a bra
- No radiographic abnormality on plain X-ray (differentiates from GH osteoarthritis)
Assessment Profile
Subjective Presentation
- Chief complaint: Progressive shoulder stiffness severely limiting daily function — inability to reach overhead, across the body, or behind the back; pain disproportionate to apparent pathology; sleep disrupted by rolling onto the affected shoulder (night pain characteristic of Stage 1)
- Pain quality: Deep, aching, and diffuse; poorly localized to the shoulder region; Stage 1 has prominent rest and night pain; Stage 2 shifts toward stiffness with pain mainly at end-range
- Onset: Insidious — gradual over weeks to months with no clear precipitating event (primary); or following trauma, surgery, immobilization, or another shoulder condition (secondary); history of diabetes mellitus, hypothyroidism, or hyperlipidemia is clinically relevant
- Aggravating factors: Any end-range shoulder movement; reaching overhead, behind the back, or across the body; lying on the affected shoulder; sudden or unexpected arm movement
- Easing factors: Supported arm position; warmth before movement; gentle movement within comfortable range; Stage 3 brings spontaneous gradual improvement
- Red flag: Screen for undiagnosed diabetes mellitus (10–36% of patients); acute sudden onset after trauma — rule out fracture or glenohumeral dislocation before treating
Observation
- Local inspection: Visible supraspinatus and infraspinatus hollowing (atrophy) in prolonged Frozen Stage — concavity above and below the spine of the scapula; no joint swelling, bruising, or bony deformity
- Posture: Rounded and elevated shoulder on the affected side; protracted scapula; arm held slightly guarded and adducted; mild lateral cervical flexion toward the affected side in severe cases
- Gait: Reduced or absent arm swing on the affected side; arm carried close to the body
Palpation
- Tone: Hypertonicity in subscapularis (primary capsular contractor — palpable in the axilla against the anterior chest wall); infraspinatus and teres minor (posterior capsule); secondary hypertonicity in upper trapezius, levator scapulae, and pectoralis minor from chronic guarding
- Tenderness: Coracoid process and rotator interval (anterior shoulder) — consistently tender in adhesive capsulitis; axillary fold and inferior capsular pouch — palpable with the arm slightly abducted, this is the site of earliest and most severe fibrosis; subacromial region; bicipital groove may be tender secondarily
- Temperature: Mild warmth at the GH joint in Stage 1 (active synovial inflammation); typically normal in Stage 2 and 3 despite ongoing fibrosis
- Tissue quality: Thickened, inelastic feel of the inferior capsular fold when palpated through the axilla; restricted accessory joint play in all directions (inferior glide most restricted, consistent with capsular pattern); reduced fascial mobility of the shoulder girdle; possible TrPs in subscapularis, infraspinatus, and upper trapezius
Motion Assessment
- AROM: Severely restricted in the capsular pattern — external rotation most limited > abduction > internal rotation; overall loss of 50–75% of normal ROM; shrug sign visible — shoulder hitches to compensate for lost GH motion (reversed scapulohumeral rhythm)
- PROM / end-feel: Equal restriction in AROM and PROM — the critical finding distinguishing capsulitis from rotator cuff pathology (where PROM may be preserved); firm, leathery capsular end-feel occurring early in range throughout all restricted planes
- Resisted testing: Typically normal in neutral position — contractile tissues are intact; weakness is secondary to disuse only; pain may be provoked at end-range positions
Special Test Cluster
| Test | Positive Finding | Purpose |
|---|---|---|
| Capsular pattern assessment (CMTO) | ER most limited > ABD > IR; equal restriction in AROM and PROM; firm capsular end-feel throughout | Confirm adhesive capsulitis — the defining and pathognomonic diagnostic finding |
| Apley's Scratch Test (CMTO) | Inability to reach behind the back (IR + extension) or behind the head (ER + abduction); significant bilateral asymmetry | Functional documentation of combined rotational and abduction loss; useful for tracking progress |
| Drop Arm Test (CMTO — rule out) | Negative — arm lowers slowly and under control | Rule out complete rotator cuff tear as primary pathology |
| Empty Can Test (Jobe's) (CMTO — rule out) | Negative for significant weakness (pain may be present from capsular stress but strength maintained) | Rule out supraspinatus tear; confirm contractile tissues are intact |
| Speed's Test (CMTO — rule out) | Negative | Rule out bicipital tendinitis as the primary pain source |
| Adhesive Capsulitis Abduction Test (supplementary) | Patient seated; examiner palpates the inferior scapular angle and passively abducts the humerus; positive if painful leathery end-feel occurs before 90 degrees and the scapula begins to move before 90 degrees of abduction | Confirm axillary fold fibrosing — directly tests the inferior GH capsular adhesions that are the pathological hallmark of adhesive capsulitis; normal scapular movement should not begin until past 90 degrees of abduction |
Supplementary: Coracoid Pain Test (pressure over the coracoid process) shows 83% sensitivity for adhesive capsulitis and can supplement the cluster when the capsular pattern is equivocal — particularly useful in early Stage 1 where restriction may not yet be dramatic.
Stage-specific note: In Stage 1, SOT tolerance may be limited by acute pain. Prioritize capsular pattern assessment and end-feel; defer provocative tests. Full cluster is appropriate in Stage 2 and 3.
Differential Assessment
| Condition | Key Distinguishing Feature |
|---|---|
| Rotator cuff tear (partial or complete) | AROM limited but PROM preserved or near-full; Drop Arm test positive in complete tear; no equal AROM/PROM restriction |
| Subacromial impingement | Painful arc 60–120°; PROM full with normal end-feel; positive Neer's and Hawkins-Kennedy; restriction is pain-limited, not capsular |
| Glenohumeral osteoarthritis | Hard, bony end-feel; older age group; X-ray shows joint space narrowing; less disproportionate pain |
| Cervical radiculopathy (referred shoulder pain) | Normal or near-normal shoulder AROM and PROM; positive Spurling's; upper extremity neurological changes; no capsular end-feel |
CMTO Exam Relevance
- CMTO Appendix category A1 (MSK conditions)
- Essential knowledge: capsular pattern (ER > ABD > IR) — frequently tested
- Key differential: adhesive capsulitis (both AROM and PROM limited equally) vs. rotator cuff tear (AROM limited but PROM may be full or near-full)
- Know the three stages and that treatment approach changes significantly between stages
- Screening for undiagnosed diabetes is clinically relevant — up to 36% of adhesive capsulitis patients have diabetes
- Contraindications: aggressive stretching during the freezing phase can worsen adhesion formation
Massage Therapy Considerations
- Primary therapeutic target: GH joint capsule — axillary fold, inferior capsular pouch, and rotator interval are the sites of primary fibrosis; periscapular musculature (upper trapezius, levator scapulae, pectoralis minor) is secondary/compensatory
- Sequencing logic: release all surrounding muscles before capsular work — guarding defeats capsular access; progression is superficial to deep, peripheral to central; balance and release rotator cuff, deltoid, pectorals, upper trapezius, levator scapulae, and rhomboids before attempting deep capsular techniques
- Pain-free rule: all work must remain pain-free — even minor guarding prevents access to deep fascial adhesions; if the client guards, the technique is too deep, too fast, or too early for the current stage
- Stage governs depth: Stage 1 (Freezing) = no direct capsular work — aggressive stretching can trigger fibroblast proliferation and worsen adhesions; Stage 2 (Frozen) = progressive capsular work as tolerated; Stage 3 (Thawing) = full depth appropriate
- Bone-on-bone rule: if a hard capsular end-feel is reached early in range, the restriction is capsular, not muscular — use joint mobilization rather than muscle stretching
- Heat/cold: warm applications before treatment to improve capsular pliability; deep heating modalities (ultrasound, if available) are beneficial; no cold contraindication specific to this condition
Treatment Plan Foundation
Clinical Goals
- Reduce periscapular and rotator cuff guarding to allow capsular access
- Soften inferior capsular fold and axillary adhesions
- Restore available ROM toward normalized scapulohumeral rhythm
- Address compensatory upper trapezius and levator scapulae overload
Position
- Supine with affected arm supported in slight abduction (pillow under elbow) for anterior and inferior capsule access
- Side-lying (affected side up) for posterior capsule and scapular work if needed
- Additional bolstering for comfort — the affected shoulder cannot tolerate unsupported positions
Session Sequence
- General effleurage to the shoulder girdle — assess tissue state; identify the most guarded areas; warm the superficial layers
- Myofascial release to upper trapezius and levator scapulae — reduce compensatory guarding before approaching the GH region
- Pectoralis major and minor release — address anterior shoulder tightness contributing to protraction
- Rotator cuff release (supraspinatus, infraspinatus, teres minor, subscapularis) — sustained compression and gentle stripping; subscapularis accessed through the axilla with permission [Stage 2/3 only — in Stage 1, keep work gentle and peripheral]
- Inferior capsular fold work — "mortar and pestle" technique: use the humeral head to soften deep fascial adhesions with gentle compression and slow decompression; sustained pressure at the axillary fold [Stage 2/3 only]
Adjunct Modalities
- Hydrotherapy: warm applications (moist heat pack or warm towel) to the GH joint before treatment to improve capsular pliability — particularly important before capsular work; referral for deep heating modalities (therapeutic ultrasound) when available; no specific cold contraindication, but cold post-treatment may be counterproductive if capsular stiffness is the dominant presentation
- Joint mobilization: inferior and posterior GH glide to restore capsular mobility — inferior glide is most restricted (consistent with capsular pattern) and is the primary mobilization direction; Grade I–II in Stage 2, Grade III in Stage 3 only; performed after all soft tissue release and capsular work (step 5); assess end-feel before mobilizing — hard capsular end-feel reached early in range confirms the restriction is capsular, not muscular [Stage 2/3 only — no mobilization in Stage 1]
- Remedial exercise (on-table): PIR / contract-relax stretching to rotator cuff — gentle post-isometric relaxation in external rotation, abduction, and internal rotation to improve available range after soft tissue and capsular work; active-assisted ROM (therapist-guided) through newly available range to reinforce gains [Stage 2/3 — PIR in Stage 2, full contract-relax in Stage 3 only]
Exam Station Notes
- Stage the condition (freezing, frozen, or thawing) before selecting treatment depth — the examiner expects to see this clinical reasoning
- Perform end-feel assessment (PROM) before any capsular work — demonstrate that you are checking for capsular vs. muscular restriction
- Demonstrate shrug sign assessment and scapulohumeral rhythm observation
- Reassess AROM (especially ER) pre- and post-treatment as an outcome measure
Verbal Notes
- Axillary access: obtain permission before working in the axillary region — "I need to work in your underarm area to access the joint capsule. Is that comfortable for you?"
- Capsular work: warn the client before sustained pressure techniques — "I'm going to apply slow, steady pressure here. You should feel pressure but not pain. Let me know immediately if it becomes painful."
- Post-treatment: advise that the shoulder may ache for 24–48 hours after deep capsular work; this is a normal treatment response; if pain increases significantly or night pain worsens, report before the next session
Self-Care
- Pendulum / Codman exercises — 2 times daily to maintain capsular mobility gains from treatment
- Towel stretches and finger ladder for progressive ROM recovery [Stage 2/3]
- Warm shower before self-mobilization exercises to improve tissue pliability
Key Takeaways
- Adhesive capsulitis follows three predictable stages: freezing (pain-dominant), frozen (stiffness-dominant), thawing (recovery), spanning 12 to 36 months
- The capsular pattern — external rotation most limited > abduction > internal rotation — with equal AROM and PROM restriction is the pathognomonic assessment finding
- During Stage 1 (Freezing), avoid aggressive stretching — fibroblast proliferation worsens adhesions
- All treatment must remain pain-free; even minor guarding is counterproductive
- Screen for undiagnosed diabetes mellitus; diabetic patients have 2–4 times higher risk and poorer long-term outcomes
- Treatment approach must change between stages — what is appropriate in Stage 3 may be harmful in Stage 1