The benefit: When you raise the dumbbells to start this exercise, you target the front of your shoulders, as well as your rotator cuff. Then comes the shrug. This part of the move helps better balance the muscles that rotate your shoulder blades. The end result: great-looking shoulders and better posture.
How to do it: Stand holding a pair of dumbbells with your feet shoulder-width apart. Let the dumbbells hang at arm's length next to your sides, your palms facing each other [A]. Without changing the bend in your elbows, raise your arms at an angle to your body (so that they form a ''Y''), until they're parallel to the floor [B]. At the top of the movement, shrug your shoulders upward [C]. Pause, then reverse the movement to return to the start, and repeat.