MUSCLES ENGAGED Back (upper) You can’t see your back without a lot of effort, but this doesn't mean you shouldn’t train it. Back exercises consisting of both back stretching and back strengthening is very important to your health and overcoming back pain. Shoulders The shoulder is the most movable joint in the body. However, it is an unstable joint because of the range of motion allowed. This instability increases the likelihood of joint injury, often leading to a degenerative process in which tissues break down and no longer function well. Equipment Used Resistance Band n/a Exercise Instructions Step 1 Start in a standing position while holding a resistance band in each hand. Step 2 Pull your elbows back and up and try to keep your elbows and wrists above your shoulders. Step 3 Extend your arms back to the starting position and keep tension in the resistance band.