Cаse Study Phillip: A physicаl therаpist is treating a 34-year-оld male, Phillip, whо repоrts neck pain as his chief complaint. Phillip has experienced this pain for the past 8 years, following a motor vehicle accident (MVA) that resulted in a 2-day hospital stay, 8 weeks of collar immobilization, and several physical therapy sessions. He states that he has "never felt the same" since the accident, describing his pain as constant, with no clear aggravating or easing factors. His pain is diffuse and difficult to pinpoint. Additionally, Phillip is currently going through a divorce and a custody battle for his children. Recently, he underwent an MRI that revealed disc bulging, degenerative disc disease, and foraminal stenosis, with his neck pain worsening significantly. The objective examination is challenging, as he reports pain levels of 8-9/10 and demonstrates empty end-feels during all cervical spine range of motion tests. Phillip flinches in pain whenever his neck is touched or palpated by the therapist. After several sessions, the PT begins to slowly implement activities that Phil is fearful of, such as returning to the gym, to the tolerance of his symptoms. Which of the following interventions is the PT implementing?