To do Shoulder Flossing, hold a band or towel in both hands with your hands about shoulder-width apart. You will adjust your hands in or out based on your mobility. Closer together requires more mobility, while further apart requires less. If you use a band, there will be some give so you can stretch the band if needed; however, with a towel there will be no give so make sure to set up correctly so that you can keep your arms straight through the full range of motion.
Stand up nice and tall with your chest pressed out as you hold the band in both hands in front of your legs.
Keeping your arms straight, lift your arms up overhead and then open them back up behind you. Reach them back toward the ground behind you, bringing them back down toward your butt. Then bring your hands back overhead and forward.
Because the band will stretch, it will give you a little play and allow you to open up wider if needed to get your arms in a full circle unlike the towel. Remember to hold in closer on the band as you gain more mobility and don’t need the band to stretch as much to allow you to complete the circle.