Long Head of Biceps Rupture
Upper LimbOverview
Long head of biceps (LHB) rupture is a complete or partial tear of the proximal tendon of the biceps brachii muscle, typically occurring at the bicipital groove. It commonly results from acute trauma superimposed on chronic tendinopathy, rotator cuff pathology, or degenerative changes. While functionally limiting, isolated LHB rupture often resolves well with conservative management and physiotherapy.
Pathophysiology
The long head of biceps originates at the supraglenoid tubercle and passes through the bicipital groove of the humerus, where it is subject to friction and mechanical stress. Chronic tendinopathy, subacromial impingement, rotator cuff tears, and age-related degeneration weaken the tendon, predisposing it to rupture from sudden eccentric loading or forceful flexion. Complete rupture results in retraction of the muscle belly, loss of active flexion and supination strength, and characteristic cosmetic deformity ('Popeye' muscle sign).
Patient Education
A biceps rupture typically does not require surgical repair for functional recovery; most patients regain satisfactory strength and function with conservative management, though some permanent weakness and cosmetic deformity may persist.
Typical Presentation
Site
Anterior shoulder and upper arm, pain localized to the bicipital groove and upper arm
Quality
Acute sharp pain followed by aching discomfort; sharp tearing sensation at moment of injury
Intensity
Severe acute pain (8-9/10) at onset, reducing to mild-moderate (3-5/10) within days; intensity varies with activity
Aggravating
Resisted elbow flexion, resisted supination, heavy lifting, forceful gripping, repetitive overhead activities
Relieving
Rest, ice application, anti-inflammatory medications, arm support/sling, gentle passive movement
Associated
Immediate bruising and swelling in upper arm, visible muscle bulging ('Popeye' sign) with complete rupture, weakness of elbow flexion and supination, palpable defect in bicipital groove, shoulder pain if concurrent rotator cuff pathology
Orthopaedic Tests
Speed's Test (Biceps Load Test I)
Procedure
Patient stands with arm at 90° shoulder flexion and full elbow extension, forearm supinated. Examiner applies downward pressure while patient resists. A positive test is pain in the bicipital groove.
Positive Finding
Anterior shoulder pain, particularly in the bicipital groove region
Related reference: Bennett WF, Arthroscopy 1998; PMID 9848587
Interpretation
Poor specificity limits clinical utility; may suggest biceps pathology but non-specific for LHBT rupture. Often used as screening test despite moderate sensitivity. Speed's test accuracy is inconsistent across studies (e.g. Bennett 1998: 90% sensitivity, 14% specificity); no reliable pair is shown.
Popeye Sign (Clinical Deformity Assessment)
Procedure
Visual inspection and palpation of the biceps muscle belly with arm relaxed at side and elbow flexed to 90°. Look for prominent bulge of muscle belly distally (proximally displaced).
Positive Finding
Visible bulge or dimple in the distal arm with loss of normal biceps contour; muscle belly appears 'bunched up'
Interpretation
Highly specific and sensitive for complete LHBT rupture. Pathognomonic sign—presence essentially confirms diagnosis. Absence does not rule out partial tears. The Popeye sign is a visible/palpable deformity; no validated sensitivity/specificity exists and the previously cited figures (attributed to Hegedus 2012) are not in that paper.
Yergason's Test
Procedure
Patient's elbow flexed to 90° with forearm pronated. Examiner resists active supination while palpating the bicipital groove for pain or subluxation of the tendon.
Positive Finding
Pain in the bicipital groove or palpable subluxation/dislocation of the biceps tendon
Related reference: Hegedus EJ et al., Br J Sports Med 2012; PMID 22773322
Interpretation
Moderate specificity suggests biceps tendon irritation or instability; more useful for detecting SLAP or chronic inflammation than acute rupture.
Biceps Load Test II (Forearm Supination Test)
Procedure
Patient supine, shoulder abducted 90° and externally rotated, elbow flexed 90°. Examiner resists active supination. Positive if anterior shoulder pain reproduces.
Positive Finding
Anterior or deep shoulder pain with resisted supination in the described position
Related reference: Kim SH et al., Arthroscopy 2001; PMID 11172245
Interpretation
Better specificity than Speed's test; more sensitive for active LHBT pathology and SLAP lesions. Useful to differentiate from other shoulder conditions. The Biceps Load Test II (Kim 2001) is validated for SLAP lesions, not long-head biceps rupture; its figures do not transfer to this condition and are shown as Not verified here.
Crank Test (Passive Range of Motion Assessment)
Procedure
Patient supine, shoulder abducted 90° and maximally externally rotated. Examiner observes and documents loss of external rotation or end-feel. Compare bilaterally.
Positive Finding
Loss of passive external rotation or guarding with pain in chronic rupture; may show increased laxity or apprehension in anterior translation
Interpretation
Non-specific test; detects glenohumeral restriction or instability secondary to biceps pathology. Useful as part of comprehensive examination but not diagnostic for rupture alone.
Upper Limb Neurodynamic Test (ULNT) with Biceps Bias
Procedure
Patient supine; shoulder abducted and externally rotated, elbow extended, forearm supinated. Examiner applies gentle cervical sidebend away from test side. Elicit symptoms between shoulder, arm, and forearm.
Positive Finding
Radicular pain, tingling, or burning along biceps distribution; increased symptoms with cervical contralateral sidebend
Interpretation
Helps differentiate nerve involvement (C5–C6 radiculopathy) from isolated musculotendinous rupture. Important for ruling out cervical referred pain.
⚠ Red Flags
- •Severe uncontrolled pain or swelling suggesting compartment syndrome
- •Signs of neurovascular compromise (numbness, tingling, colour changes, coolness distally)
- •History of significant trauma with polytrauma or fracture
- •Inability to move arm following injury suggesting associated brachial plexus injury
- •Systemic symptoms (fever, night sweats, weight loss) suggesting infection or malignancy
⚡ Yellow Flags
- •Work-related or compensable injury affecting motivation for rehabilitation
- •Catastrophic thinking about loss of strength or function
- •Fear-avoidance behaviour limiting early mobilization
- •Unrealistic expectations regarding cosmetic outcome or timeline for recovery
- •Psychological distress related to visible muscle deformity ('Popeye' sign)
Osteopathic Techniques
Region
Bicipital groove and proximal humerus
Technique
Rationale
Gentle soft tissue mobilization to the healing tendon and surrounding musculature reduces pain, improves local circulation, and facilitates early tissue remodelling without disrupting repair; performed within pain-free range
Region
Glenohumeral joint and rotator cuff
Technique
Rationale
Gentle oscillatory movements restore capsular mobility and maintain joint proprioception; addresses associated shoulder dysfunction and rotator cuff pathology that may have preceded rupture
Region
Cervical spine and shoulder girdle
Technique
Rationale
Muscle energy techniques restore normal cervical and thoracic posture, reducing upper crossed syndrome and mechanical stress on the shoulder complex; improves neuromuscular control in the kinetic chain
Region
Upper arm musculature (biceps, brachialis, triceps)
Technique
Rationale
Targeted soft tissue work to the brachialis and triceps compensates for biceps dysfunction, reduces muscular guarding, and facilitates co-contraction patterns necessary for functional recovery
Region
Thoracic spine and rib cage
Technique
Rationale
Restoring thoracic mobility enhances scapulohumeral rhythm and reduces compensation patterns; improves breathing mechanics and reduces sympathetic nervous system activation during rehabilitation
Region
Anterior shoulder and arm
Technique
Rationale
Lymphatic drainage techniques reduce post-acute swelling and haematoma formation, improving local tissue environment and pain perception; facilitates clearance of inflammatory mediators
Add-On Approaches
Chinese Medicine
Acupuncture to LI-10 (Quchi), LI-11 (Pool at the Bend), and local ah-shi points to reduce inflammation, promote Qi circulation, and facilitate tissue healing; moxibustion to strengthen Yang energy
Chiropractic
Manipulation of the cervical spine and shoulder complex to restore segmental mobility and reduce referred pain; mobilization of the glenohumeral joint with attention to scapulohumeral rhythm
Physiotherapy
Progressive resistance exercise programme starting with isometric exercises, progressing to isotonic and isokinetic strengthening; proprioceptive training and kinetic chain exercises; modalities including ultrasound, interferential therapy, and ice application
Remedial Massage
Deep transverse friction to the healing tendon (after acute phase) to facilitate organized scar formation; remedial massage to secondary muscular tightness in pectoralis major, anterior deltoid, and triceps to reduce compensation patterns
Rehabilitation Exercises
Pendulum Shoulder Circles
Supine Shoulder Flexion with Towel Slide
Pectoralis Major Doorway Stretch
Cross-Body Shoulder Stretch
Isometric Elbow Flexion (Neutral Position)
Supine Active-Assisted Elbow Flexion
Supine Elbow Flexion with Wrist Supination (Light Resistance Band)
Seated Biceps Curl with Dumbbell (Progressive Weight)
Scapular Retraction in Standing
Single-Arm Stability Ball Support Hold
Prone Row with Unilateral Arm (Opposite Side to Injury)
Walking or Stationary Cycling with Progressive Intensity
Referral Criteria
- •Severe uncontrolled pain unresponsive to conservative management beyond 2-3 weeks
- •Neurovascular compromise or signs of brachial plexus injury
- •Suspected compartment syndrome with severe swelling and pain
- •Young athletic patient or overhead athlete seeking surgical repair for functional return to sport
- •Associated full-thickness rotator cuff tear or glenohumeral instability requiring imaging and specialist assessment
- •No functional improvement in strength or pain after 6-8 weeks of conservative management
- •Imaging findings revealing additional pathology (fracture, dislocation, or extensive soft tissue damage)