Exercise guide
Standing Shoulder Medial And Lateral Rotation
- Beginner
- Isolation
- Rep-based
- Back
- Shoulders
- Upper arms
This isolation exercise improves shoulder joint stability and mobility by targeting the internal and external rotators, providing a foundation for stronger deltoid and pectoral performance.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Stand tall with feet hip-width apart and shoulders retracted and down.
- Bend your working arm at the elbow to a 90-degree angle, keeping the upper arm pinned against your ribcage.
- Position your forearm parallel to the floor, pointing straight ahead.
- Place your opposite hand on the working forearm to provide manual resistance (on the thumb side for lateral rotation, or the pinky side for medial).
How to do it
- Exhale as you rotate your forearm away from (lateral) or toward (medial) your midline, pushing against the resistance of your opposite hand.
- Inhale as you slowly return to the starting position, resisting the pressure of your non-working hand during the eccentric phase.
- Maintain a controlled 2-second tempo for both the rotation and the return.
- Complete the set on one arm before switching to the other side.
Form checklist
- Keep the elbow glued to your side; do not let it flare out or move away from the body.
- Ensure the movement occurs only at the shoulder joint without twisting the torso.
- Keep your wrist straight and firm throughout the movement.
- Maintain a neutral spine and avoid shrugging the shoulders toward your ears.
Pro tips
- Place a rolled-up towel between your elbow and your side; if the towel falls, your form is breaking.
- Focus on the 'deep' sensation in the shoulder joint rather than the amount of force applied.
- Use the non-working hand to provide 'isokinetic' resistance, matching your strength through the entire range of motion.
Make it harder
- Increase the manual pressure applied by the non-working hand to maximum tolerable resistance.
- Perform the exercise while standing on one leg to challenge your core and balance.
Frequently asked
- What muscles does the standing shoulder medial and lateral rotation work?
- The standing shoulder medial and lateral rotation primarily targets the deltoids, and also works the rotator cuff and serratus anterior as secondary muscles.
- What equipment do you need for the standing shoulder medial and lateral rotation?
- The standing shoulder medial and lateral rotation requires no equipment — just your body weight.
- Is the standing shoulder medial and lateral rotation good for beginners?
- Yes. The standing shoulder medial and lateral rotation is a beginner-friendly movement and a strong foundation to build on.