Your Rhomboids are muscles in between your shoulder blades. They often get sore and stiff from working at a computer with poor posture. If you need to stretch your Rhomboids, be sure to stretch your pectoral muscles as well.
If you are getting pain in your upper back, please see your local massage therapist or other healthcare professional.
Be sure to review to my General Guidelines for stretching before doing any of the stretches I demonstrate and recommend. It’s always a good idea to see a health care professional before starting a new exercise program.