The shoulder problem is a thoracic problem

Reaching overhead requires the thoracic spine to extend. When it will not, the shoulder makes up the difference, and that borrowed range is where swimmer’s shoulder comes from.

High swim volume tends to reduce thoracic extension over time, so the mobility work is corrective rather than optional.

A swimmer-focused session

Mobility first, then scapular control, then posterior chain. Two sessions a week fits alongside most training loads.

  • Arc over the carriage — 2 minutes thoracic extension
  • Breaststroke prone on long box — 1 spring, 8 reps
  • Pulling straps 1 and 2 — 1 spring, 8 each
  • Chest expansion, kneeling — 1 spring, 10 reps
  • Single-leg bridging — 2 springs, 8 each side
  • Mermaid — 1 spring, 5 each side

Land training that does not add shoulder volume

A swimmer already does thousands of shoulder repetitions a week. Land work should build control and posterior strength without adding to that overhead volume.

This is why the emphasis is on pulling and extension rather than pressing. Overhead pressing on top of swim volume is how shoulders become symptomatic.