A U.S. Air Force Airman performs a physical therapy exercise with an elastic band at Osan Air Base, Republic of Korea, Feb. 12, 2019. The 51st Medical Operations Squadron physical therapy office implemented a post-flight checklist to minimize the effects of flying. This includes aiding recovery for pilots due to the prolonged sitting while flying aircraft and dealing with gravitational forces from maneuvers. (U.S. Air Force photo by Staff Sgt. Sergio A. Gamboa)