The one-arm cable lateral raise is an isolated shoulder exercise that targets the deltoids, while increasing stability in both the wrists and the core.
Stand next to a cable pulley machine with the handle attachment adjusted to the lowest setting. The working side of your body should be closest to the cable. With the outside arm, reach across your body, grab the handle and stand straight up with your arm fully extended and feet facing forward. Grip the machine with your inside arm for added support.
Maintaining a slight bend in your working elbow, raise your arm up to shoulder height. Pause, and then slowly lower the weight back to the starting position.
Do not let hand travel past shoulder-height at the highest point.