To carry your own body weight and perform a large range of movements it is essential to have a strong and flexible back. Abdominal and middle back stretch exercise keeps your back and joints flexible to prevent injuries and discomforts. Middle back stretches are also good in reducing back pain. Using an exercise ball takes your workout to another level to create resistance. The instability of ball makes it more challenging for you to improve flexibility and release tension. Middle back stretch on a stability ball works on your entire back, abs and neck muscles.