Water jogging
Staff Sgt. Derek McGee, 51st Medical Group public health technician, and Staff Sgt. Roderick Gillins, 51st MDG mental health technician, run in place with water-resistant dumbbells to increase their heart rates during a water-jogging class at the base pool on Osan Air Base, Republic of Korea, April 29, 2013. Water jogging offers participants a chance to get a cardio-vascular workout without putting a lot of stress on lower extremities. (U.S. Air Force photo/Senior Airman Alexis Siekert)