What is the fine-grained topic of the following text: If your pain is more in the upper back it could be postural, so being more aware of time spent on devices (facebook-itis), or computer, and doing regular stretches for your Pec muscles (arms up on corner of room and lean in) and postural holds (back against a wall, pull shoulders and head back gently until you feel tightness between shoulder blades) and holding for a minute, several times throughout the day. Only return the topic.
Posture correction and stretching exercises for upper back pain