This is a simple seated shoulder exercise.
- Sit on a ball or chair with your back straight, but leaning forward slightly. Have an exercise band placed under both feet while holding onto the ends in each hand. While bringing your right hand out in front of you, bring your left hand straight back, keeping your elbows straight but not locked.
- Now bring the left arm forward and the right arm straight back. Keep your back straight and avoid shrugging your shoulders.
Repeat the exercise 6-8 times per arm, rest, then repeat the exercise if desired.