The Dumb Waiter: a smart Pilates exercise that helps open up the chest and improve shoulder rotation. It also encourages good shoulder blade placement and posture.
Stand tall and place both hands palm up in front of you with elbows bent to 90 degrees. Keeping elbows locked in by your sides, and shoulder blades gently slid down towards hips, slowly open you hands apart and then back together. Repeat 6-8 times.