Here is a great Upper Back exercise with Stretch Band

Stand with feet shoulder-width apart, knees soft, posture erect and abdominals tight. Grasp the stretch band so hands are slightly wider than shoulder width apart. With your palms facing the floor, bend your elbows and lift your arms to chest height.

Expand your chest and pull your shoulder blades back and together. Keep your lower body stationary and maintain good posture throughout the exercise.

Return to starting position and repeat.