Dumbbell Internal Rotation

Rotator CuffDumbbell

Side-lying isolation exercise to strengthen your subscapularis and teres major. Building internal rotation improves shoulder joint balance and stability. Keep it light and precise.

How to do it

1Lie on your side, bend your bottom arm to 90 degrees, and hold a dumbbell.

2Pin your bottom elbow firmly against your ribs.

3Exhale as you slowly rotate your forearm up toward your stomach.

4Pause at the top to feel the deep shoulder rotators contract.

5Inhale as you smoothly lower your forearm back parallel to the floor.

Common mistakes

Lifting your elbow off your side, taking tension off the rotator cuff.

Using too much weight, forcing larger muscles to take over and risking a strain.

Rolling your torso backward to move the dumbbell, reducing shoulder isolation.

Breathing

Exhale as you rotate your forearm inward. Inhale as you return to the starting position.

Make it harder or easier

Perform the movement bodyweight-only to make it easier.

Hold the top contraction for two seconds to increase difficulty.

This is general guidance, not a medical opinion. Listen to your body: if it hurts, stop. If you have an injury or a chronic condition, talk to a doctor first.