Purpose of Exercise: To focus the work on the side delt head. This movement helps bring out definition in the shoulders and works the rear and front heads as well.
Stand upright, with your arm down beside you, holding on to a handle attached to a floor-level pulley. Place your other hand on your hip. Keeping your arm straight, lift it up in an arc in one smooth motion until it is higher than your head. Lower your arm back to your thigh. Finish your repetitions, and then repeat using the other arm.
Insider's Tip: If you have a weak point in the rear delt, bending your torso forward slightly while doing cable laterals works this area in addition to the side delts.