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Water jogging
Staff Sgt. Derek McGee, 51st Medical Group public health technician, checks his heart rate after a minute-long underwater sprint during a water-jogging class at the base pool on Osan Air Base, Republic of Korea, April 29, 2013. Participants wore water-resistant heart-rate monitors during the workout to monitor how hard they were working. (U.S. Air Force photo/Senior Airman Alexis Siekert)

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Tags: Sports
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