We're going to do an exercise a very simple exercise for your upper back muscles. low intensity, you can do this even if you have back pain, it shouldn't hurt too much. Sit down on a chair with your back straight. Make sure you sit with your back straight and good posture. Put your hands in front of your body touching in a praying position the praying mantis position. And when you're ready after a few deep breaths, bring your elbows back straight, as if something's pushing your hands apart and returning.
Once again, bring your elbows back as if something's pushing each hand separately and return with each repetition that you do you want to be squeezing The middle of your back as if someone's putting a pencil in the middle of your back and you're going to try to hold that pencil with your shoulder blades. Here you can see it from the front view, starting the praying mantis position and bring your elbows straight back, as if someone's pushing your hands apart. Throughout this exercise, you want to keep your hands in the same level and make sure you're breathing properly.