Air Force Reserve Senior Master Sgt. David Parcher, from the 919th Maintenance Squadron, demonstrates proper push-up techniques during a unit physical training session at Duke Field, Fla., Sept. 7. The squadron begins each monthly unit training assembly with a mass stretching and calisthenics session before releasing members to finish individual workouts such as running, weight training, basketball, volleyball and more. (U.S. Air Force photo/Tech. Sgt. Jasmin Taylor)
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