Step by step instructions, muscle activation and variants for the Dumbbell Shoulder Internal Rotation at 90° Abduction.
The dumbbell shoulder internal rotation at 90° abduction is a rotator cuff strengthening exercise that targets the subscapularis and the internal rotators of the shoulder. With the arm held out to the side at 90° and the elbow bent to 90°, the forearm rotates downward against the resistance of the dumbbell, building shoulder stability and injury resilience.
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The Dumbbell Shoulder Internal Rotation at 90° Abduction is a foundational movement that builds strength and muscle through controlled, progressive overload. Train it 1 to 2 times per week with 3 to 5 working sets per session, gradually adding weight or reps as form holds up.