Bootcamp Express
Nikki Stevenson, Bootcamp Express student, and Lisa Pizzo, lead group fitness instructor, perform leg lifts at the Aderholt Gym on Hurlburt Field, Fla., March 3, 2014. During the class, workout intervals ranged from 30 seconds to one minute. (U.S. Air Force photo/Airman 1st Class Andrea Posey)