Dumbbell Standing Shoulder External 90-Rotation
Improve shoulder mobility! This exercise strengthens rotator cuff muscles for better stability and reduced injury risk.
The Dumbbell Standing Shoulder External 90-Rotation mainly works the shoulders, with help from the back. You'll need: dumbbells.
Required Equipment

Dumbbell Standing Shoulder External 90-Rotation Muscles Worked
Primary
Rotator Cuff (infraspinatus); Small Rotator (teres minor)
Secondary
Boxer Muscle (serratus anterior); Rear Shoulder (Delts) (posterior deltoid)
Dumbbell Standing Shoulder External 90-Rotation Variations and Alternatives
How to do the Dumbbell Standing Shoulder External 90-Rotation
Dumbbell Standing Shoulder External Rotation at 90 Degrees
Positioning:
Stand upright with your feet shoulder-width apart for stability.
Hold a dumbbell in your right hand.
Raise your right arm to shoulder height, bending your elbow at a 90-degree angle (like a "L" shape).
Your forearm should be parallel to the ground, and your elbow should be close to your body.
Keep your left arm relaxed at your side.
Movement:
Focus on keeping your elbow pinned to your side.
Rotate your right arm outward. Your forearm should move away from your body while maintaining the 90-degree angle at your elbow.
Rotate your arm until you feel a stretch in the shoulder but do not go beyond a comfortable range of motion.
Slowly return your arm back to the starting position.
Repeat for the desired number of repetitions (typically 10-15).
Switch arms and repeat the exercise on the left side.
Tips:
Maintain a straight posture throughout the movement.
Avoid using momentum; focus on slow, controlled movements.
Breathe out as you rotate your arm outward and inhale as you return to the starting position.
Dumbbell Standing Shoulder External 90-Rotation FAQs
What muscles does the Dumbbell Standing Shoulder External 90-Rotation work?
The Dumbbell Standing Shoulder External 90-Rotation mainly works the shoulders, with help from the back. The main muscles are the infraspinatus and teres minor.
What equipment do you need for the Dumbbell Standing Shoulder External 90-Rotation?
Dumbbells.
What workout day should the Dumbbell Standing Shoulder External 90-Rotation go on?
It belongs on push day in a push/pull/legs routine.
What are some Dumbbell Standing Shoulder External 90-Rotation variations and alternatives?
Similar exercises include the Arm-Up Rotator Stretch, Bodyweight Standing Scapular External Rotation, Cable 90-Degree Shoulder External Rotation and Cable Standing Shoulder External Rotation.
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