How heavy should I lift for this exercise?

This is a prehabilitation and stability movement, not a power lift; use light weight that allows for 12 to 20 controlled repetitions.

Where should I feel the tension?

You should feel a deep burn in the back of the shoulder and the shoulder blade area, rather than the large deltoid muscles.

Can I do this with a dumbbell instead?

You can, but the cable provides more consistent tension throughout the entire range of motion, whereas a dumbbell loses tension at the top of the movement.

Cable External Rotation Guide: Build Stronger Shoulders

Master the cable external rotation to strengthen your rotator cuff, improve posture, and prevent shoulder injuries with our expert guide.

How to Perform

Set the cable pulley to elbow height and attach a single D-handle grip.
Stand perpendicular to the machine and grasp the handle with your far hand, keeping your elbow tucked against your side at a 90-degree angle.
Place a small rolled towel between your elbow and your ribs to ensure the upper arm remains stationary throughout the set.
Rotate your forearm away from the machine as far as comfortably possible while keeping your elbow pinned to your side.
Pause for a second at the peak of the contraction to feel the tension in the back of your shoulder.
Slowly return the handle to the starting position across your midsection under full control.
Complete the desired repetitions then repeat the process with the opposite arm.

Common Mistakes

Allowing the elbow to drift away from the torso during the rotation.
Using excessive weight that forces the torso to twist to complete the rep.
Performing the movement too quickly and relying on momentum rather than muscle tension.
Restricting the range of motion by not bringing the arm fully across the body.

Muscles Worked

Primary movers

Shoulders

Stabilizers

Infraspinatus
Teres Minor
Rear Deltoids

Related Guides

Arm Raises (T/Y/I) — Shoulders
Arnold Press — Shoulders
Australian pull-ups — Shoulders

Shoulders · Shoulders