Rotator Cuff Injuries: Causes, Symptoms, and Physiotherapy Treatment

Shoulder pain is one of the most common complaints I see in clinic — and rotator cuff injuries are behind a significant proportion of those presentations. Whether you're a weekend swimmer, a tradesperson, or someone who simply reached overhead at the wrong angle, the rotator cuff is surprisingly easy to strain and surprisingly slow to heal without the right approach.

The good news: the vast majority of rotator cuff injuries respond well to physiotherapy. Surgery is far less common than most people expect.

Here's what you need to know.

The rotator cuff is a group of four muscles and their tendons that surround the shoulder joint: supraspinatus, infraspinatus, teres minor, and subscapularis. Together, they stabilise the ball of the upper arm within the shoulder socket and allow you to lift, rotate, and reach with your arm.

Because these tendons pass through a narrow space beneath the shoulder blade (the subacromial space), they are vulnerable to compression, friction, and overload — particularly with repetitive overhead activity.

Rotator cuff tendinopathy is the most common presentation. The tendon becomes irritated and degenerates over time — often from repetitive overhead use, poor shoulder mechanics, or age-related changes. Pain is typically felt at the front or outer side of the shoulder, worsens with lifting, and can disturb sleep when lying on the affected side.

Rotator cuff tears range from partial (a portion of the tendon is damaged) to full-thickness (the tendon is completely torn). Partial tears are extremely common and often respond well to conservative management. Full-thickness tears in active individuals may require surgical review, but many are managed successfully with physiotherapy alone.

Subacromial impingement syndrome occurs when the rotator cuff tendons are compressed during shoulder movement, causing pain and inflammation. It often coexists with tendinopathy.

• Repetitive overhead activity (swimming, throwing, painting, construction work)
• Sudden forceful movement — catching a heavy object, a fall on an outstretched arm
• Age-related tendon degeneration (most common in people over 40)
• Poor shoulder blade control and posture
• Weakness in the surrounding shoulder stabilisers

• Aching pain at the front or outer shoulder, sometimes radiating into the upper arm
• Pain when lifting the arm to the side or overhead
• Weakness when reaching behind your back or rotating the arm
• Night pain — particularly when lying on the affected shoulder
• A painful arc of movement (pain between roughly 60–120 degrees of arm elevation)

If you have sudden severe pain after a specific incident, significant weakness, or are unable to lift your arm at all, seek assessment promptly.

A thorough physiotherapy assessment will identify which structure is involved, the severity of the injury, and any contributing factors — such as shoulder blade movement, thoracic posture, or muscle imbalances.

Treatment is progressive and typically involves:

In the acute phase, the priority is reducing irritation without complete rest. Complete immobilisation weakens the tendon and surrounding muscles. Your physiotherapist will guide you on which movements to modify and which to maintain.

Targeted exercises to restore strength and endurance in the injured tendon and the surrounding stabilisers. This is the cornerstone of rotator cuff rehabilitation. Isometric exercises (muscle contraction without movement) are often used early to reduce pain while maintaining tendon load.

Poor scapular mechanics are a major contributor to rotator cuff problems. Exercises to improve the timing and strength of the muscles that control the shoulder blade reduce compression on the rotator cuff tendons during overhead movement.

Addressing thoracic stiffness, forward head posture, and faulty movement patterns that place excess load on the shoulder.

For athletes and workers, the final phase involves progressive return to the specific demands of your sport or occupation — whether that's a swimming stroke, a throwing action, or sustained overhead work.

Recovery timelines vary depending on the type and severity of the injury:

• Mild tendinopathy: 6–12 weeks with consistent rehabilitation
• Moderate tendinopathy or partial tear: 3–6 months
• Full-thickness tear managed conservatively: 6–12 months
• Post-surgical repair: 9–12 months for return to full activity

These are guidelines, not guarantees. Consistency with your home exercise programme and attending regular physiotherapy sessions significantly influences outcomes.

Most rotator cuff injuries do not require surgery. Research consistently shows that physiotherapy produces outcomes equivalent to surgery for many partial and even some full-thickness tears — with fewer risks and a faster return to function.

Surgical review is typically recommended when:

• A full-thickness tear is causing significant functional limitation in a younger, active person
• Conservative management over 3–6 months has not produced adequate improvement
• There is a traumatic, acute full-thickness tear in an otherwise healthy tendon

Your physiotherapist will refer you for imaging (ultrasound or MRI) and orthopaedic review if surgery is indicated.

At Dalton Physiotherapy, shoulder injuries are assessed and treated with a structured, evidence-based approach. Tamar Dalton holds a Doctor of Physiotherapy (DPT) and has extensive experience managing shoulder injuries in both elite athletes and the general population.

If you're dealing with persistent shoulder pain, don't wait for it to resolve on its own — early physiotherapy intervention produces better outcomes and reduces the risk of a minor injury becoming a chronic problem.

Book an appointment online or call 0404 320 503.