The goal of this clinical trial is to learn if motivational interviewing (MI) works to improve symptoms in people with thoracic outlet syndrome (TOS). TOS is a condition that causes long-term pain, numbness, and weakness in the arm and shoulder area. The main questions it aims to answer are:
* Does MI lower pain and improve arm function in people with TOS?
* Does psychological resilience predict treatment outcomes in people with TOS? Researchers will compare participants who receive MI sessions plus a home exercise program to those who receive a home exercise program alone. Participants will be randomly assigned to one of the two groups.
Participants will:
* Follow a home exercise program for 6 weeks
* Some participants will also attend up to 4 motivational interviewing sessions
* Complete questionnaires about pain, function, sleep, anxiety, and depression at the start and end of the 6-week program