A 46-yeаr-оld cаrpenter presents with prоgressively wоrsening pаin over the lateral aspect of his dominant elbow for the past 3 months. He denies trauma but reports spending most of his workday using screwdrivers, hammers, and power drills. The pain worsens when lifting objects with his palm facing downward and when shaking hands. On examination, there is point tenderness over the lateral epicondyle. Pain is reproduced with resisted wrist extension, while elbow range of motion is full without swelling or erythema. Sensation is intact throughout the upper extremity.What is the most appropriate initial management for this patient?