Shoulder impingement is a common cause of shoulder pain, particularly during lifting, reaching, or overhead activity. It occurs when structures inside the shoulder become irritated during movement, leading to pain, stiffness, and reduced function.

Many people notice symptoms during daily tasks such as reaching for a seatbelt, placing an item on a shelf, or sleeping on the affected side. Shoulder impingement physiotherapy focuses on identifying why symptoms occur and guiding recovery through movement, strength, and load management.

What Is Shoulder Impingement?

Shoulder impingement refers to irritation of the rotator cuff tendons or the shoulder bursa as the arm moves. These tissues sit in a small space beneath the acromion, which is part of the shoulder blade.

When this space becomes irritated during movement, pain can develop. This may contribute to conditions such as shoulder bursitis or rotator cuff tendinopathy.

Common Symptoms of Shoulder Impingement

Symptoms often develop gradually and may fluctuate depending on activity levels.

• Pain when lifting the arm, especially overhead
• A painful arc during shoulder movement
• Discomfort when lying on the affected side
• Clicking or catching sensations in the shoulder
• Reduced shoulder strength or endurance
• Pain with reaching behind the back or across the body

If symptoms persist or worsen, assessment is recommended to prevent further irritation and loss of function.

Where Does Shoulder Impingement Occur?

Impingement typically occurs in the subacromial space, which sits between the upper arm bone (humerus) and the acromion. The supraspinatus tendon is most commonly involved, although other rotator cuff tendons and the bursa may also be affected.

Pain may initially appear only during certain movements. Over time, symptoms can increase and begin to affect daily activities and sleep.

What Causes Shoulder Impingement?

Shoulder impingement usually develops due to a combination of structural and movement-related factors.

Primary Shoulder Impingement – Structural Factors

Some people naturally have a smaller subacromial space. Over time, age-related changes such as joint degeneration or bony changes may further reduce this space.

When available space decreases, tendons and the bursa may become irritated during arm movement.

Secondary Shoulder Impingement – Movement and Load Factors

Secondary impingement relates to how the shoulder moves and manages load. Reduced shoulder blade control, muscle weakness, fatigue, or poor load progression may increase strain on the rotator cuff.

Repetitive overhead activity, previous injury, prolonged inactivity, or rapid increases in training volume can all contribute.

Who Is Most at Risk?

Shoulder impingement is more common in people who regularly use their arms overhead, including:

• Tennis players
• Swimmers
• Manual workers with overhead tasks
• Gym participants performing repetitive pressing movements

You may also find Swimmer’s Shoulder helpful if your symptoms occur during aquatic or overhead sport.

How Is Shoulder Impingement Diagnosed?

A physiotherapist or doctor will assess shoulder movement, strength, posture, and symptom behaviour. This helps identify contributing factors and rule out other causes of shoulder pain.

Imaging and Scans

Ultrasound may help identify tendon or bursa changes and allows assessment during movement. MRI can identify tendon tears or structural changes but does not show dynamic movement patterns. X-rays are generally used to assess bone-related changes only.

Shoulder Impingement Physiotherapy Treatment

Physiotherapy aims to reduce pain, restore movement, and improve shoulder load tolerance. Treatment plans are individual and may progress through several stages.

Common components include:

• Education about activity modification and load management
• Exercises to improve shoulder blade and rotator cuff control
• Gradual strengthening based on tolerance
• Movement retraining for daily tasks or sport

As symptoms improve, rehabilitation progresses toward higher loads, speed, and sport or work-specific demands.

Can Shoulder Impingement Improve Without Treatment?

Some mild cases settle with rest and activity modification. However, persistent or recurring symptoms often benefit from guided rehabilitation to address contributing movement and strength factors.

Conclusion

Shoulder impingement is a common and manageable cause of shoulder pain. Early assessment helps clarify what is driving symptoms and guides appropriate care.

With a structured approach, many people return to comfortable movement and normal activity levels over time.

Related Shoulder Articles

• Shoulder Bursitis
• Rotator Cuff Tear
• Biceps Tendinopathy
• Frozen Shoulder
• Shoulder Instability

References

• Zhong Z, et al. Effect of scapular stabilisation exercises on subacromial pain syndrome: systematic review and meta-analysis. Frontiers in Physiology. 2024. https://pmc.ncbi.nlm.nih.gov/articles/PMC10940535/
• Boland K, et al. Current concepts in the rehabilitation of rotator cuff related disorders: a scoping review. International Journal of Sports Physical Therapy. 2021. https://pmc.ncbi.nlm.nih.gov/articles/PMC8082254/
• Powell JK, et al. Rotator cuff–related shoulder pain: is it time to reframe the advice, “You need to strengthen your rotator cuff”? Journal of Orthopaedic & Sports Physical Therapy. 2021. https://www.jospt.org/doi/10.2519/jospt.2021.10199
• Pieters L, et al. An update of systematic reviews examining the effectiveness of conservative physical therapy interventions for subacromial shoulder pain. Journal of Orthopaedic & Sports Physical Therapy. 2020. https://pubmed.ncbi.nlm.nih.gov/31726927/
• Naunton J, et al. Effectiveness of progressive and resisted vs non-progressive/non-resisted exercise in rotator cuff related shoulder pain: systematic review and meta-analysis. Clinical Rehabilitation. 2020. https://pubmed.ncbi.nlm.nih.gov/32571081/

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