Lying One-Arm Lateral Raise
To perform the Lying One-Arm Lateral Raise, lay flat on your side, keeping your lower arm extended on the floor. Hold a dumbbell in your upper hand with a neutral grip, your elbow slightly bent. From this position, raise the dumbbell in a wide arc until it is directly above your shoulder, then slowly lower it back. Remember to maintain control during the motion for maximum muscle work.