Second Lt. Sheriden Martinez, 316th Comptroller Squadron financial management officer, performs body squats during a Cross-Fit workout in the Tactical Ffitness Center here Wednesday. Cross-Fit is a core strength and conditioning program designed to optimize physical competence in ten recognized fitness domains of cardiovascular and respiratory endurance, stamina, strength, flexibility, power, speed, coordination, agility, balance, and accuracy. (U.S. Air Force photo/ Senior Airman Steven Doty)