Have you tried the deep squat rotation stretch for thoracic spine mobility? If we take a closer look at the anatomy of your back, the mechanics of the thoracic spine that allow it to rotate to one side are the same that allow it to extend.📝 . Sufficient T-spine extension is needed in order for the arms to move into a good position with the barbell overhead or when performing walking overhead lunges.🏋🏼‍♀️ . To measure your mobility here, tape an X on the ground, and rotate as far as you can to