Get fit with Group Fitness classes
VANDENBERG AIR FORCE BASE, Calif. -- Robert Keyser and Briana Hamilton, participants of a Hardcore Fitness class, sprint across the basketball court at the fitness center here Thursday, Sept. 16, 2010. The participants of the class performed a circuit training exercise focusing on cardio fitness, strength training and flexibility. (U.S. Air Force photo/Senior Airman Andrew Satran)