Stand about hip width apart. If you tend to overstretch your joints like me, keep a micro bend in your knees. Stretch your hands over your head, grab the band, fingers pointing to the front. Squeeze your belly button in, move your shoulders away from your ears. Move your slightly bend arms to the side. Move back slowly and controlled.
Bring your resistance band under tension behind your shoulders. Arms are stretched to the sides. Bring your straight arms together in front of your chest.