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ART:074: Shoulder Leak Patterns and Their Correction

Executive Summary

The shoulder is the most mobile joint in the body and a critical link in the tennis kinetic chain. Shoulder leaks—including insufficient rotation, instability, and compensatory patterns—can significantly reduce racket head speed and increase injury risk. This article presents the most common shoulder leak patterns and provides targeted corrective strategies.

Common Shoulder Leak Patterns

Insufficient Shoulder Rotation

  • Observation: The shoulder fails to achieve full internal rotation during the serve or groundstroke
  • Cause: Tight posterior shoulder muscles, poor external rotation range, weak internal rotators
  • Result: Reduced racket head speed, lower power output
  • Correction: Shoulder flexibility exercises, internal rotator strengthening

Shoulder Instability

  • Observation: The humeral head moves excessively within the glenoid fossa during rotation
  • Cause: Weak rotator cuff muscles, ligamentous laxity, poor scapular control
  • Result: Energy loss at the shoulder, increased injury risk
  • Correction: Rotator cuff strengthening, scapular stabilization exercises

Shoulder Dominance

  • Observation: The shoulder compensates for weak trunk rotation by overworking
  • Cause: Weak core muscles, poor trunk rotation, arm-dominant technique
  • Result: Shoulder overuse, injury risk, reduced power
  • Correction: Core strengthening, technique correction, trunk rotation emphasis

Poor Shoulder Timing

  • Observation: The shoulder rotates out of sequence with the trunk and arm
  • Cause: Poor coordination, insufficient practice, injury compensation
  • Result: Disrupted kinetic chain, reduced power
  • Correction: Timing drills, video feedback, sequential activation exercises

Practical Application: "The Shoulder Check"

During your strokes, focus on feeling your shoulder rotate fully and in sequence with your trunk and arm. If you feel your shoulder is "stuck" or not rotating enough, work on shoulder mobility and internal rotator strength. If you feel your shoulder is unstable or moving excessively, work on rotator cuff strengthening and scapular stabilization. If your shoulder is doing too much work, focus on improving your trunk rotation to reduce the load on your shoulder.