181K views · 18K reactions | If you’re having any upper back or shoulder pain and you’ve tried stretching and massage, but it didn’t help, you may need to try working on strengthening those muscles. Strengthening your upper back and shoulder muscles will help improve your posture, reduce your pain, and improve your function. Try this prone weighted snow angel exercise to improve shoulder mobility, posture, and upper back and shoulder strength. #shoulderpain #shoulderpainrelief...