Exercise videos showing how to perform a Arm Rotation.
The individual starts by standing and placing the arms straight out and perpendicular with the body. The hands and arms are moved in circles, first forward, then backward, for a selected number of rotations.
The targeted muscle groups of this exercise can be modified by repositioning the arm and body: making circles with the arms pointed out straight in front of the individual moves the focus to the front deltoids, while bending over and moving the arms up and down instead of in circles emphasizes the rear deltoids.