After surgery, you will use a sling for up to 6 weeks. Your doctor or physical therapist will teach you gentle exercises to keep your shoulder moving for about 6 weeks, until you can start exercises to get your strength back.Most people have returned to all their activities by 3 months after surgery.fter surgery, you will use a sling for up to 6 weeks. Your doctor or physical therapist will teach you gentle exercises to keep your shoulder moving for about 6 weeks, until you can start exercises to get your strength back.