Side-Lying External Rotation
Quick Information
Category
Balance & Stability
Difficulty
Beginner
Equipment
Dumbbell
Primary muscle group
Rotator Cuff
Secondary muscle groups
Posterior Deltoid, Middle Trapezius
Movement pattern
Shoulder External Rotation
Training goal
Injury Resilience
Sport
General Athletic Development, Volleyball, Baseball, Tennis, MMA, Boxing, Wrestling, BJJ, Hockey
Overview
Purpose. Strengthen the shoulder external rotators to support overhead and pressing work.
How it fits the system. A beginner-level shoulder external rotation entry in the Balance & Stability section, programmed to develop injury resilience. Related work in the library: Scapular Push-Up and Scapular Pull-Up.
Primary muscles
Rotator Cuff
Secondary muscles
Posterior Deltoid, Middle Trapezius
Movement pattern
Shoulder External Rotation
Equipment
Dumbbell
Difficulty
Beginner
How to Perform
- Lie on your side with the working arm on top and the elbow bent to 90 degrees.
- Tuck a rolled towel between the elbow and the ribs.
- Start with the forearm resting across the stomach.
- Rotate the forearm upwards, keeping the elbow pinned to the side.
- Stop when the forearm is roughly vertical.
- Lower slowly and repeat, then change sides.
Coaching Cues
- Keep the elbow glued to the side.
- Use a very light weight.
- Move only at the shoulder, not the wrist or trunk.
Common Mistakes
- Letting the elbow drift away from the ribs.
- Rolling the trunk backwards to lift the weight.
- Using loads that are far too heavy.
Progressions & Regressions
Progressions
Increase load slightly or slow the tempo.
Regressions
Perform without weight or with a light band.
When to Use It
When to use
As rotator cuff work for overhead athletes and lifters.
When not to use
With sharp shoulder pain during rotation.
Programming
2 to 3 sets of 12 to 15 reps per side.
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