Prone CobraThe cobra is a great exercise to teach you how to activate muscles in the upper back, as well as improve your thoracic extension mobility. It also improves your posture.
Wall PullsThe wall pull is a simple exercise anyone can do to begin activating the horizontal pulling muscles.All you need is a doorway frame to do it.
Suspension Bodyweight RowsThe body row is similar to seated cable rows that you do at the gym. It will strengthen the rhomboids, lats, posterior deltoids, and middle traps.