The study will be conducted using a parallel-group randomized controlled experimental design to determine the effect of progressive muscle relaxation exercises on postoperative fear of falling, pain, and anxiety levels in patients undergoing total hip and knee arthroplasty. The study group will consist of patients who have undergone total hip or knee arthroplasty in the Orthopedics and Traumatology Clinic of a university hospital. Research data will be collected using the Descriptive Information Form, the The Fear of Falling Scale, the Numeric Rating Scale (NRS), and the State-Trait Anxiety Inventory. Patients will be randomly assigned to intervention and control groups, and progressive muscle relaxation exercises will be applied to the patients in the intervention group.