Master Sgt. Tony Russell, 434th Security Forces Squadron combat arms specialist, completes sit-ups as part of his fitness test at Grissom Air Reserve Base, Ind., Oct. 31, 2013. On Oct. 21, 2013, a new fitness instruction was published by the Air Force, which contained some major changes to key parts of the fitness program. (U.S. Air Force photo/Tech. Sgt. Mark R. W. Orders-Woempner)
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