U.S. Air Force band, Max Impact members conduct butterfly sit-ups during circuit training at the Holiday Inn Hotel and Suites gym in Mesa, Ariz., Jan. 31, 2015. The band finds various work-outs between high intensity interval training, circuits, weight lifting and running to maintain their fitness goal to be the fittest U.S. Air Force Band unit. (U.S. Air Force photo/ Senior Airman Nesha Humes)