2 sets x 12-17 reps
Start with a weight that seems light to avoid straining your shoulder joints. Stand with your feet shoulder-width apart and a slight bend at the knees. Let your arms hang straight down, with your elbows pointing back. With your head, shoulders and wrists in neutral, lift your arms straight out and up to the side, reaching for the walls on either side of you, until your arms are parallel with the floor. Hold for a second and then slowly lower your arms to the original start position, contracting your deltoids throughout the motion.