Swimmer's Shoulder

Why swimmers get shoulder pain

The shoulder is a ball-and-socket joint with a shallow socket. It relies on the rotator cuff muscles and the shoulder blade (scapula) for stability. In swimming, the arms provide most of the propulsion, especially in freestyle, butterfly and backstroke.

Problems develop when:

• training volume increases too quickly
• rotator cuff muscles fatigue, so the ball rides up and pinches the tendons under the acromion
• scapular muscles are weak, so the shoulder blade does not rotate properly (scapular dyskinesis)
• technique faults increase stress: crossing over the midline on hand entry, a "thumb-first" entry with internal rotation, dropping the elbow, limited body roll, breathing only to one side
• the joint is naturally loose (laxity is common and helpful in swimmers but increases instability)
• the back of the shoulder is tight, limiting rotation
• training aids such as hand paddles overload the shoulder

Common diagnoses

Symptoms

• pain in the front or side of the shoulder during swimming
• pain at a particular part of the stroke, often hand entry, catch or recovery
• pain after training, and later at rest or at night
• reduced power or speed, and needing to change stroke
• tenderness, clicking or a sense of instability

Diagnosis

A sports physician or physical therapist will ask about training volume, strokes and recent changes, then assess shoulder range of motion, strength, stability and scapular movement. Watching swimming video helps identify technique issues. Imaging is used if pain persists or a structural injury is suspected:

• ultrasound for tendons and bursa
• MRI or MR arthrogram for rotator cuff and labral tears

Treatment

Relative rest and load management

• reduce yardage and intensity, and stop painful strokes
• avoid paddles and pull buoys temporarily
• kick sets (with a snorkel and arms at the side) can maintain fitness

Physical therapy

• rotator cuff strengthening, particularly external rotation
• scapular stabilizing exercises (lower trapezius, serratus anterior)
• stretching the back of the shoulder (sleeper stretch, cross-body stretch) and the chest
• core and thoracic spine mobility for better body roll

Technique correction

A coach can help with hand entry in line with the shoulder, a high elbow catch, adequate body roll and bilateral breathing.

Pain relief

Ice after training, and acetaminophen (paracetamol) or ibuprofen at label doses for short periods. A corticosteroid injection may help stubborn bursitis or impingement while rehab progresses but is not a long-term solution.

Return to swimming

Gradually increase distance and intensity, typically by about 10% a week, adding strokes back one at a time. Most swimmers return within 4 to 12 weeks.

Surgery

Rarely needed. It is considered for significant labral tears, recurrent dislocations or rotator cuff tears that do not improve with rehab.

Prevention

• increase training load gradually, avoiding big jumps after breaks
• do dryland shoulder and scapular strengthening year-round
• warm up thoroughly
• vary strokes and use bilateral breathing
• use paddles sparingly
• address pain early rather than swimming through it

Frequently asked questions

What is swimmer's shoulder?

Swimmer's shoulder is a general term for overuse shoulder pain in swimmers, usually caused by rotator cuff tendinopathy, impingement, bursitis or shoulder instability from repetitive overhead strokes.

How long does swimmer's shoulder take to heal?

Most cases improve within 4 to 12 weeks with reduced training, physical therapy and technique changes. Structural injuries such as labral tears may take longer and occasionally need surgery.

What exercises help swimmer's shoulder?

Rotator cuff strengthening (external rotation with a band), scapular exercises such as rows and Y-T-W raises, and stretching the back of the shoulder help most swimmers. A physical therapist can tailor a program.

Should I keep swimming with shoulder pain?

Mild aching that settles quickly may allow modified training, such as reduced distance, avoiding painful strokes and dropping paddles. Sharp pain, night pain, weakness or instability mean you should stop and get assessed.