A Superior Labrum Anterior Posterior (SLAP) tear, sometimes referred to as a SLAP lesion, is an injury to the labrum of the shoulder joint. The labrum is a ring of cartilage that deepens the shoulder socket and provides attachment points for several key tendons, including the biceps tendon. SLAP tears can cause pain, weakness, and loss of shoulder function, particularly during overhead or throwing activities. Physiotherapy for SLAP tears is the first line of treatment, aiming to restore shoulder mobility, stability, and strength without surgery in many cases.
Key Facts
- SLAP tears account for up to 26% of shoulder injuries seen in athletes, particularly throwers and weightlifters 🔗
- Physiotherapy-led rehabilitation can result in a return-to-sport rate of over 70% without the need for surgery 🔗
- In Australia, shoulder injuries including SLAP tears are a leading cause of time lost in overhead sports such as cricket, tennis, and swimming
Risk Factors
- Overhead athletes (tennis, cricket, baseball, swimming)
- Occupations with repetitive shoulder use (factory work, painting)
- Age over 40
- Previous shoulder dislocations or injuries
- Heavy weightlifting, especially overhead presses
- Poor shoulder or scapular biomechanics
Symptoms
- Deep, dull ache in the shoulder
- Pain with overhead movements
- Pain reaching behind the back
- Clicking, popping, or grinding sensations
- Reduced shoulder strength
- Decreased range of motion
- Pain or weakness when throwing
- Difficulty lying on the affected side
Aggravating Factors
- Throwing or serving in sports
- Lifting weights overhead
- Sudden pulling movements
- Sleeping on the injured shoulder
- Repetitive reaching overhead
- Rapid acceleration or deceleration of the arm
Causes
SLAP tears may occur from both traumatic incidents and gradual wear.
Traumatic causes include falls onto an outstretched arm, shoulder dislocations, or sudden pulling injuries such as trying to catch a heavy object. Non-traumatic causes are typically related to repetitive overhead activity or gradual age-related degeneration of the labrum.
How Is It Diagnosed?
A physiotherapist or doctor will begin with a detailed discussion of symptoms, history of shoulder use, and any previous injuries. This is followed by a physical examination assessing shoulder strength, range of motion, and stability. Specific orthopaedic tests, such as O’Brien’s test or the biceps load test, may indicate labral involvement. Since clinical tests alone are not fully reliable, imaging is often recommended to confirm the diagnosis.
Investigations & Imaging
- MRI
- Provides detailed images of soft tissue including the labrum
- MR Arthrogram
- Contrast dye improves visibility of labral tears, most accurate test for SLAP lesions
- X-ray
- Typically normal but may rule out associated bony injuries
Grading / Classification
- Type I
- Fraying of the superior labrum without detachment
- Type II
- Detachment of the labrum and biceps anchor from the glenoid
- Type III
- Bucket-handle tear of the labrum with intact biceps anchor
- Type IV
- Bucket-handle tear extending into the biceps tendon
Physiotherapy Management
Exercise
Targeted exercises are the foundation of SLAP tear physiotherapy. Rehabilitation focuses on strengthening the rotator cuff and scapular stabilisers to offload the labrum. Early stages involve gentle mobility and isometric exercises, progressing to dynamic strengthening and sport-specific drills. Common exercises include external rotation with bands, scapular retraction drills, and progressive overhead strengthening.
Activity Modification
Physiotherapists guide patients to avoid movements that strain the labrum, particularly repetitive overhead activities and heavy lifting. Gradual reintroduction of sport-specific skills, such as throwing mechanics, is structured to minimise reinjury.
Manual Therapy
Hands-on techniques such as joint mobilisation and soft tissue release can help reduce stiffness and improve shoulder mobility, particularly in the capsule and surrounding muscles that tighten after a SLAP tear.
Postural Retraining
Poor posture, such as rounded shoulders, increases strain on the biceps tendon and labrum. Physiotherapists provide postural retraining through ergonomic advice, strengthening of postural muscles, and cues for shoulder blade positioning during activity.
Bracing & Taping
Taping techniques can provide short-term support during activity, improving shoulder alignment and reducing painful loading. Bracing may be used for athletes during return-to-play stages.
Dry Needling
Dry needling of overactive shoulder muscles, such as the upper trapezius, may reduce pain and improve function when combined with exercise therapy.
Heat & Ice
Ice is beneficial in early stages to manage inflammation and pain. Heat may be introduced later to ease muscle tension and improve mobility before exercise.
Tens
Transcutaneous electrical nerve stimulation (TENS) may be used by physiotherapists for pain control, especially in the early management of acute SLAP tears.
Education
Education is central to physiotherapy for SLAP tears. Patients are guided on injury mechanisms, activity modifications, realistic timelines, and prevention strategies. This empowers patients to take an active role in their recovery.
Other Treatments
Other treatment options may include anti-inflammatory medication, corticosteroid injections for pain relief, or platelet-rich plasma (PRP) therapy, though evidence for PRP in SLAP tears is limited. These are usually used in conjunction with physiotherapy, not as standalone solutions.
Surgery
Surgical intervention is considered when physiotherapy and conservative care fail to relieve symptoms. Procedures may include labral repair with anchors, biceps tenodesis (reattaching the biceps tendon), or debridement of frayed tissue. Post-operative physiotherapy is essential, beginning with a period of rest in a sling, followed by structured rehabilitation to restore motion, strength, and sport-specific function. Recovery may take 3 to 12 months depending on the surgery type and patient goals.
Prognosis & Return to Activity
With physiotherapy, many patients achieve full recovery and return to sport within 3 to 4 months. Post-surgical recovery may take longer, with full return to competitive throwing sports often requiring 9 to 12 months. Evidence shows that up to 72% of athletes return to their pre-injury level after appropriate management.
Complications
- Recurrent SLAP tears
- Ongoing shoulder instability
- Stiffness or frozen shoulder after immobilisation
- Biceps tendon injury
- Chronic shoulder pain
Preventing Recurrence
- Warm up thoroughly before overhead sports
- Avoid repetitive heavy overhead lifting
- Maintain rotator cuff and scapular muscle strength
- Incorporate shoulder mobility drills into training
- Modify throwing or serving technique to reduce shoulder stress
- Allow adequate rest between high-intensity training sessions
- Use taping or bracing during high-risk activities if recommended
When to See a Physio
- Persistent shoulder pain lasting more than 2 weeks
- Clicking, popping, or catching sensations in the shoulder
- Pain or weakness during throwing or lifting
- Reduced ability to reach overhead or behind the back
- Night pain interfering with sleep
- Shoulder instability after injury