220623-Z-MJ107-1007
U.S. Air Force Tech. Sgt. Kendall Nielsen, 173rd Medical Group bioenvironmental technician, completes a hanging knee-raise during the David R. Kingsley Workout of the Day in Klamath Falls, Ore., June 23, 2022. The DRK Hero WOD movements included weighted Russian kettlebell swings, pull-ups, double and single-unders, leg or knee raises, 25-meter lunges with each exercise performed as quickly as possible, with minimal stopping or pausing between movements. (U.S. Air National Guard photo by Staff Sgt. Emily Copeland)