Supraspinatus Tendonitis

Upper Limb

Overview

Supraspinatus tendonitis is inflammation of the supraspinatus tendon, commonly resulting from repetitive overhead activities, postural dysfunction, or rotator cuff impingement. It presents with pain in the anterolateral shoulder, particularly with abduction and overhead movements. This condition is a frequent cause of shoulder dysfunction and can progress to rotator cuff tears if left untreated.

Pathophysiology

The supraspinatus originates from the supraspinous fossa of the scapula and passes through the narrow subacromial space before inserting on the greater tubercle of the humerus. Repetitive microtrauma, poor scapular biomechanics, humeral head superior migration, or direct subacromial impingement causes inflammatory changes within the tendon. Degenerative changes, calcification, and reduced vascularity at the critical zone (the area of poorest blood supply 10-15mm proximal to the insertion) contribute to chronicity. Associated subacromial bursitis often accompanies this condition.

Patient Education

Supraspinatus tendonitis typically improves with activity modification, postural correction, scapular stabilization exercises, and gradual progressive loading rather than complete rest.

Typical Presentation

Site

Anterolateral shoulder, may radiate to lateral arm and deltoid region

Quality

Dull ache, sharp pain with specific movements, mechanical 'catching' sensation

Intensity

Mild to moderate (typically 4-7/10), variable depending on activity level

Aggravating

Overhead activities, abduction 60-120 degrees (painful arc), reaching across body, sleep on affected side, sustained postures with rounded shoulders

Relieving

Rest from provocative activities, ice application, arm support in sling, postural correction, gentle pendulum movements

Associated

Scapular dyskinesis, reduced shoulder abduction strength, restricted internal rotation, subacromial impingement signs, possible night pain, muscle guarding in upper trapezius and levator scapulae

Orthopaedic Tests

Empty Can Test (Jobe's Test)

Procedure

Patient stands with arms at 90° abduction and 45° horizontal adduction (thumbs pointing down). Examiner applies downward pressure while patient resists.

Positive Finding

Pain or weakness in the supraspinous fossa region, particularly with resistance

Sensitivity / Specificity

72% / 60%

Jobe & Jobe, 1983, Orthopaedic Review; Hegedus et al., 2015, British Journal of Sports Medicine

Interpretation

Suggests supraspinatus muscle-tendon pathology; however, moderate sensitivity and specificity mean a negative test does not exclude supraspinatus tendonitis, and a positive test should be corroborated with other findings and imaging

Painful Arc Test

Procedure

Patient actively abducts the shoulder from 0° to full elevation. Examiner observes for a region of pain during the movement arc.

Positive Finding

Localized pain typically between 60° and 120° of abduction

Sensitivity / Specificity

52% / 54%

Hegedus et al., 2015, British Journal of Sports Medicine

Interpretation

Low sensitivity and specificity; suggests impingement but may be present in multiple rotator cuff and bursal conditions. Most useful as a screening tool rather than a confirmatory test

Supraspinatus Tendon Palpation

Procedure

With patient seated or supine, examiner palpates directly over the supraspinous fossa, just medial to the anterolateral corner of the acromion, while shoulder is in slight internal rotation and abduction.

Positive Finding

Localized tenderness over the supraspinatus tendon insertion or musculotendinous junction

Sensitivity / Specificity

null / null

Interpretation

Direct palpation for focal tenderness is a fundamental clinical finding suggesting local tendon irritation; however, sensitivity and specificity are not well quantified in the literature. Should be used as part of comprehensive assessment rather than as a standalone diagnostic test

Infraspinatus Test (Strength Test)

Procedure

Patient lies prone with shoulder abducted 90° and externally rotated. Examiner resists external rotation at the elbow while stabilizing the scapula.

Positive Finding

Pain or weakness with external rotation resistance; preserved strength favours primary supraspinatus involvement over infraspinatus

Sensitivity / Specificity

null / null

Interpretation

Helps differentiate supraspinatus tendonitis from infraspinatus involvement; negative findings (normal strength) support supraspinatus as the primary source, though clinical reasoning must integrate history and other tests

Hawkins-Kennedy Impingement Test

Procedure

Patient seated with shoulder flexed to 90° and internally rotated passively. A positive test is elicited by further internal rotation pressure applied by the examiner.

Positive Finding

Pain in the anterosuperior shoulder, suggesting subacromial impingement of the supraspinatus tendon

Sensitivity / Specificity

72% / 44%

Hegedus et al., 2015, British Journal of Sports Medicine

Interpretation

Moderately sensitive for impingement syndrome but poor specificity; positive result suggests subacromial space compromise but does not isolate supraspinatus pathology. Should be used alongside other clinical findings

Speed's Test (Biceps Loading Test I)

Procedure

Patient flexes shoulder to 90° with elbow extended and forearm supinated. Examiner applies downward pressure while patient resists.

Positive Finding

Anterior shoulder pain (particularly around the bicipital groove), which may occur concurrently with supraspinatus involvement

Sensitivity / Specificity

72% / 55%

Hegedus et al., 2015, British Journal of Sports Medicine

Interpretation

Primarily tests biceps tendon pathology but is often positive in primary impingement syndromes affecting the supraspinatus. A positive result should prompt assessment for concomitant biceps tendonitis or evaluate impingement as a contributing factor

⚠ Red Flags

  • •Acute severe pain with trauma suggesting acute rupture
  • •Progressive neurological deficit or numbness in arm/hand
  • •Signs of infection (fever, lymphadenopathy, systemic illness)
  • •Unilateral shoulder swelling with constitutional symptoms suggesting systemic disease
  • •History of malignancy with shoulder pain
  • •Inability to maintain arm position (complete rotator cuff tear)
  • •Severe night pain unresponsive to conservative management

⚡ Yellow Flags

  • •Fear-avoidance behavior limiting shoulder use
  • •Catastrophic thinking about condition progression
  • •High stress or anxiety exacerbating muscle tension
  • •Work-related dissatisfaction or job insecurity
  • •Poor self-efficacy regarding recovery
  • •Delayed presentation (>12 weeks) with minimal improvement
  • •Dependence on passive treatments without active participation

Osteopathic Techniques

Region

Subacromial space and rotator cuff

Technique

Soft Tissue

Rationale

Direct soft tissue techniques to the supraspinatus, infraspinatus, and subscapularis muscles reduce muscular guarding, improve local circulation, and address trigger points contributing to referred pain patterns

Region

Glenohumeral joint and shoulder capsule

Technique

Articulation

Rationale

Gentle mobilization of the glenohumeral joint in pain-free ranges promotes synovial fluid nutrition, reduces capsular restriction, and restores accessory motion necessary for pain-free function

Region

Scapulothoracic articulation

Technique

MET

Rationale

Muscle energy techniques address scapular dyskinesis by normalizing tone in serratus anterior, lower trapezius, and other scapulohumeral muscles, improving scapular mechanics and reducing subacromial impingement

Region

Cervicothoracic spine and upper thoracic segments

Technique

HVLA

Rationale

Restoration of thoracic mobility and neutral cervical posture reduces compensatory shoulder tension, improves scapular positioning, and normalizes shoulder girdle mechanics

Region

Rotator cuff and supraspinatus

Technique

Functional

Rationale

Functional technique positions the shoulder in ease and allows release of protective patterns and neuromuscular tension without aggressive stretching

Region

Lymphatic drainage of shoulder region

Technique

Lymphatic

Rationale

Lymphatic drainage techniques reduce inflammatory exudate around the subacromial space and promote tissue healing through improved vascular return

Add-On Approaches

Chinese Medicine

TCM approach emphasizes Qi and blood stagnation in the shoulder meridians; acupuncture to LI15 (Jianyu), TE14 (Jianliao), and SI11 (Tianzong) with moxibustion to restore meridian flow and reduce inflammation

Chiropractic

Chiropractic adjustment of glenohumeral joint coupled with scapulothoracic mobilization and correction of cervicothoracic subluxations to optimize shoulder biomechanics

Physiotherapy

Progressive resistance exercises focusing on scapular stabilizers (serratus anterior strengthening), rotator cuff activation through high-repetition, low-load training, and proprioceptive training

Remedial Massage

Remedial massage targeting upper trapezius, levator scapulae, pectoralis minor, and subscapularis to reduce myofascial tension and trigger point activity contributing to pain patterns

Rehabilitation Exercises

Pendulum Circles (Codman's Pendulum)

Range of MotionBeginner

Supine Passive Shoulder Abduction with Gravity Reduction

Range of MotionBeginner

Cross-body Shoulder Stretch (Horizontal Adduction Stretch)

StretchingBeginner

Sleeper Stretch (Internal Rotation)

StretchingIntermediate

Prone Shoulder Abduction (Y-position) with Neutral Rotation

StrengtheningBeginner

Prone External Rotation with Elbow Flexed (90/90 position)

StrengtheningIntermediate

Quadruped Shoulder Stabilization (Rhythmic Stabilization)

StrengtheningIntermediate

Serratus Anterior Activation (Quadruped Scapular Protraction)

StrengtheningBeginner

Scapular Retraction and Stabilization (Prone Squeeze)

PosturalBeginner

Upper Crossed Syndrome Correction (Thoracic Extension with Shoulder Blade Squeeze)

PosturalIntermediate

Single-arm Proprioceptive Training (Wobble Board or Unstable Surface)

BalanceAdvanced

Stationary Cycling with Postural Support

CardiovascularBeginner

Referral Criteria

  • •Failure to improve after 6-8 weeks of conservative treatment
  • •Suspected complete rotator cuff tear (positive drop-arm test, inability to initiate abduction)
  • •Signs of glenohumeral instability requiring specialist assessment
  • •Persistent night pain significantly affecting sleep quality
  • •Evidence of calcific tendonitis on imaging requiring specific intervention
  • •Acute traumatic onset with severe pain and functional loss
  • •Suspected glenohumeral osteoarthritis or advanced degenerative changes
  • •Neurological symptoms suggesting cervical radiculopathy or neural compromise
  • •Systemic disease features (rheumatoid arthritis, polymyalgia rheumatica) requiring rheumatology input