Lateral raises work the deltoids and the supraspinatus.
How to do:
1. Seated or standing, bend over so the upper body is parallel with the ground.
2. Assume a shoulder wide stance with your knees slightly bent and your arms slightly bent, hanging in front of body, palms facing each other.
3. A dumbbell should be held in both hands.
4. Lift your arms out and away from body, using the shoulders, until the hands/elbows are at shoulder height (trying to fly). Your hands should face the floor at the top of the movement.
5. Lower your arms, using the shoulders, back to the starting position.