JOINT BASE LANGLEY-EUSTIS, Va. – David Pittman, U.S. Army Training and Doctrine Command Headquarters personnel, runs on a treadmill while being monitored by Samantha Melius, Armed Forces Wellness Center supervisory health educator, at the Armed Forces Wellness Center, at Joint Base Langley-Eustis, Virginia, Sept. 7, 2023. Pittman ran until he reached his desired heart rate so he can have the most accurate data to determine his appropriate training zone. (U.S. Air Force photo by Airman 1st Class Adisen Smith)