Dumbbell Cuban Shoulder Rotations

Dumbbell Cuban Shoulder Rotations are a compound mobility exercise that combines an upright row with external rotation to strengthen the rotator cuff and posterior deltoids. This movement is essential for bulletproofing the shoulders and improving posture by targeting the often-neglected muscles of the upper back.

Exercise movement reviewed by:Marie Braga, PT, DPT, CSCS
How Iridium Helps

Since the rotator cuff muscles are small and easily fatigued, form degradation happens quickly. The AI analyzes your RPE and previous recovery data to ensure you use a weight that challenges stability without compromising safety. If your HRV or daily readiness score is low, the app may recommend lighter loads to focus purely on mobility, preventing strain on the delicate shoulder joint.

Form Cues

Do
  • Raise elbows until they are level with your shoulders
  • Rotate your forearms upward while keeping elbows fixed in place
  • Squeeze your shoulder blades together throughout the movement
  • Control the descent slowly to maximize stability
Don't
  • Don't let your elbows drop below shoulder height during rotation
  • Don't use momentum to swing the weights up
  • Don't arch your lower back excessively
  • Don't shrug your shoulders up toward your ears

Common Mistakes

  • Using weight that is too heavy
  • Dropping elbows during the rotation phase
  • Rushing through the movement
  • Hyperextending the lumbar spine

Muscles Worked

This exercise primarily targets the posterior deltoids and the external rotators of the rotator cuff (infraspinatus and teres minor). It also engages the rhomboids and trapezius to stabilize the scapula, making it highly effective for correcting forward-rounded shoulders.

Primary

Posterior Deltoid

Secondary

Lateral DeltoidRhomboids

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