1. Stand tall and strong with your feet placed about shoulder-width apart
2. Interlock your fingers and stretch your hands out in front of you at about shoulder level, rounding your upper back as you do so
3. If necessary, raise your hands slightly upwards to activate other areas of your upper back and shoulder blades
The primary muscles stretched in the Upper Back Standing Stretch are the Middle Back/Lats and Traps. The secondary muscles stretched are the Shoulders.