Lie on your belly, squeeze your nable inward. Extend your legs and arms. Lift your arms and legs at the same time (palms facing each other) and make small cutting movements with arms and legs. Your shoulders are relaxed all the time, pushing away from your ears.
Exercises
Butterfly with Thera Band
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.