Muscles worked
What the cable external rotation trains
Tap a muscle to see just that one and what it does in the lift.
Before the first rep
How to set up
- 01
Set the pulley. Put the cable at elbow height and clip on a single handle. Pick the lightest plate or two; you should be able to do 15 smooth reps.
- 02
Stand side-on. Stand with the machine on one side and take the handle in the hand farthest from it, so the cable runs across the front of your body.
- 03
Step out. Take a step or two away from the stack so the weight is lifted off the pin and there is light tension with your forearm across your stomach.
- 04
Pin the elbow. Tuck your elbow against your side and bend it to 90 degrees. A rolled towel between your elbow and ribs helps you keep it there.
- 05
Stand tall. Feet about hip width, ribs down, shoulders level and shoulder blades gently set back. Keep the wrist straight in line with your forearm.
Step by step
How to do the cable external rotation
- 01
Start position. Begin with your forearm across your stomach, elbow at 90 degrees and tucked to your side.
- 02
Rotate out. Turn your forearm out away from your body like a gate swinging open, keeping the elbow at your side and bent at 90 degrees.
- 03
Stop at your range. Go as far as you can without the elbow leaving your side or your torso turning. For most people the forearm ends up past pointing straight ahead, angled out toward the side.
- 04
Pause. Hold for a moment at the end and feel the back of the shoulder working, not your arm or lower back.
- 05
Return slowly. Let the forearm come back across your body over two to three seconds, keeping the cable from pulling you in.
- 06
Switch sides. Finish all reps on one arm, then turn around and repeat with the other hand.
Cues to say in your head
- Elbow glued to ribs
- Swing the gate open
- Forearm moves, elbow stays
- Ribs down, stand tall
- Slow on the way back
Fix these first
Common mistakes
Elbow drifting away from your side
Keep it pinned to your ribs, using a towel as a check. If the towel drops, the weight is too heavy or you are going too far.
Turning the torso to finish the rep
Keep your hips and chest facing forward. Only the forearm rotates; stop where your body would have to twist.
Going too heavy
Drop the weight until you can do smooth, slow reps. The cuff muscles are small, and heavy loads usually get moved by other muscles instead.
Shrugging the shoulder up
Keep the shoulder down away from your ear and the shoulder blade set. Lighter weight usually fixes this.
Letting the cable snap you back
Control the return over two to three seconds. The slow return is half the work.
Bending the wrist
Keep the wrist straight so the forearm and hand move together and the rotation comes from the shoulder.
Stay safe
This is a light, slow exercise, so the normal way to end a set is simply to stop when you can no longer rotate without the elbow leaving your side, then let the handle return under control and step back toward the stack before letting go. Move only through a range that feels comfortable. If you feel sharp or pinching pain in the shoulder, stop. Ongoing shoulder pain, clicking with pain, or weakness after an injury is a reason to see a doctor or physical therapist rather than to keep training through it.
Programming
Sets, reps and how much weight
| Goal | Sets | Reps | Load | Rest |
|---|---|---|---|---|
| Muscle | 2 to 3 | 10 to 15 | 60–70% 1RM | 1 to 1.5 min |
| Endurance | 2 to 3 | 15 to 20 | 50–60% 1RM | 45 to 60 sec |
| Technique | 2 | 12 to 15 | 40–50% 1RM | 30 to 60 sec |
Plan your next session
Put in a recent set. You get working weights for your goal, a warm-up and the plates to load.
Estimated 1RM 216 lb
Endurance sets
108–129lb
2 to 3 sets of 15 to 20 reps, 45 to 60 sec rest. Light and steady. A common way to program cuff work.
Estimates use the Epley formula and work best from sets of 3 to 8 reps. Treat them as a starting point and adjust by how the first working set moves.
Questions
Cable External Rotation questions
What is the best shoulder external rotation exercise?
For most people a standing cable external rotation or a side-lying dumbbell external rotation works well. The cable keeps tension through the whole range; the dumbbell needs no machine. Pick the one you can do with a pinned elbow and slow control.
What muscles does cable external rotation work?
Mainly the infraspinatus and teres minor, the rotator cuff muscles that turn your upper arm outward. The rear delt helps, and your upper back holds the shoulder blade steady.
How heavy should cable external rotation be?
Light. Choose a weight you can rotate for 12 to 20 slow reps with your elbow staying at your side. If your torso twists or the elbow drifts, it is too heavy.
Is dumbbell external rotation as good as cable?
Both train the same muscles. The side-lying dumbbell version is hardest near the start and gets easier as the forearm rises, while the cable keeps tension more even through the range. Either is fine if your form is clean.
How often should I do external rotations?
Two or three times a week is a common choice, often as 2 to 3 light sets at the end of an upper body session or in a warm up.
Should I put a towel between my elbow and side?
It helps. A rolled towel between your elbow and ribs reminds you to keep the elbow in, and many coaches use it to keep the arm in a comfortable position.
Train in Protocol
Log your cable external rotation by voice. Protocol tracks the rest.
Your last session shows up before every set, warm-ups and plates are worked out for you, and your coach sees every lift next to your sleep and recovery.