Exercise guide
Cable Shoulder Internal Rotation
- Beginner
- Isolation
- Rep-based
- Back
- Shoulders
- Upper arms
This isolation exercise specifically targets the subscapularis of the rotator cuff, improving shoulder stability and internal rotation strength. It is a vital movement for injury prevention and maintaining a balanced, healthy shoulder joint.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Set the cable pulley to elbow height and attach a D-handle.
- Stand sideways to the machine with your working arm closest to the pulley.
- Grasp the handle and tuck your elbow into your side at a 90-degree angle, with your forearm pointing toward the machine.
- Place a small rolled-up towel between your elbow and your ribs to ensure the elbow stays pinned.
How to do it
- Exhale as you rotate your forearm across your body toward your midsection, keeping your elbow glued to the towel.
- Move only at the shoulder joint, maintaining a 90-degree bend in the elbow throughout the range of motion.
- Inhale as you slowly return the handle to the starting position with a controlled 2-second eccentric phase.
- Complete the set on one arm before turning 180 degrees to work the opposite side.
Form checklist
- Keep your elbow pinned to your side; do not let it drift away from your body.
- Maintain a tall, neutral spine and keep your hips and shoulders square to the front.
- Avoid using your wrist to pull the weight; keep the wrist straight and firm.
- Ensure the movement is slow and controlled, avoiding any momentum or jerking.
Pro tips
- Focus on the mind-muscle connection by imagining the humerus (upper arm bone) spinning in place within the shoulder socket.
- Use a very light weight; the rotator cuff muscles are small and respond best to high-quality, high-repetition sets rather than heavy loads.
Make it harder
- Add a 2-second isometric hold at the point of maximum contraction (when the hand is closest to the belly).
- Slow the eccentric (return) phase to 4 seconds to increase time under tension for the subscapularis.
Frequently asked
- What muscles does the cable shoulder internal rotation work?
- The cable shoulder internal rotation primarily targets the rotator cuff, and also works the abs, biceps, and serratus anterior as secondary muscles.
- What equipment do you need for the cable shoulder internal rotation?
- The cable shoulder internal rotation uses cable.
- Is the cable shoulder internal rotation good for beginners?
- Yes. The cable shoulder internal rotation is a beginner-friendly movement and a strong foundation to build on.