The exercise external shoulder rotations primarily works the muscles Shoulders and secondarily works the muscles .

Proper posture Stand with your back straight and your legs shoulder-width apart. Position your arms on either side, with your hands at head level. Movement Take a dumbbell in each hand and perform an internal and external rotation movement, moving your hands up and down.

Proper posture Stand with your back straight and your legs shoulder-width apart. Position your arms on either side, with your hands at head level. Movement Take a dumbbell in each hand and perform an internal and external rotation movement, moving your hands up and down.