The videos on this page demonstrate several exercises that help with stretching chest muscles.  Shortened chest muscles result in rounded shoulders and upper back AKA "hunching". Rounded shoulders lead to increased stress on the low back muscles due to excessive pull on the back muscles. If you have tendencies to hunching, add a couple of these exercises to core stretching exercises for specific muscles involved in your back pain. Learn the proper technique as demonstrated in the videos and perform them daily as part of your regular routine.