This exercise affects the upper back muscles and the deltoid muscles.
Face the G-Flex equipment, grab the handles and while your arms are straight in front of you, lean back in a ca. 45 degree angle, legs should be straight all the time. The exercise is more difficult if the inclination angle is higher because you work with a bigger body weight in this case.
Your elbows should be slightly bent during the exercise. Extend your arms to the side as wide as you are able to and try to close your shoulder blades. Then let your extended arms down to the starting point. Pay attention that the cord should be firm all the time and focus on the feel in your back muscles.