Have you got a stiff upper back or neck at the moment? Try these stretches:
Child’s Pose Stretch (+/- foam roller)
Thread Needle (+/- foam roller)
Clam Shell Stretch
Bow and Arrow (+/- theraband)
Sunbather (+/- foam roller)
Foam Roller Thoracic Spine Extension
Foam Roller Chest Stretch
Thoracic resisted rotation