Photos: House of Pain tests defenders' endurance

Staff Sgt. Joseph Kaczynski, a member of the 51st Security Forces Squadron, runs sprints during a House of Pain training event in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2014. House of Pain mimics training used by the U.S. Marine Corps and completion is mandatory for all 51st SFS personnel. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Staff Sgt. Joseph Kaczynski, a member of the 51st Security Forces Squadron, runs sprints during a House of Pain training event in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2014. House of Pain mimics training used by the U.S. Marine Corps and completion is mandatory for all 51st SFS personnel. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

A defender from the 51st Security Forces Squadron wields a night stick prior to striking a rubber mannequin during a House of Pain training event in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2014. Airmen were required to repeatedly strike the figure while shouting “get back,” to practice techniques they would use if they were attacked on duty. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

A defender from the 51st Security Forces Squadron wields a night stick prior to striking a rubber mannequin during a House of Pain training event in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2014. Airmen were required to repeatedly strike the figure while shouting “get back,” to practice techniques they would use if they were attacked on duty. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

A member of the Republic of Korea air force air police completes jumping lunges with encouragement from a member of the 51st Security Forces Squadron during a House of Pain training event in the fitness center at Osan Air Base, ROK, Feb. 27, 2014. Defenders frequently train with their ROK counterparts to strengthen the relationship between the services. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

A member of the Republic of Korea air force air police completes jumping lunges with encouragement from a member of the 51st Security Forces Squadron during a House of Pain training event in the fitness center at Osan Air Base, ROK, Feb. 27, 2014. Defenders frequently train with their ROK counterparts to strengthen the relationship between the services. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

A member of the 51st Security Forces Squadron secures his protective headgear prior to a combatives bout during a House of Pain training event in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2014. The confidence course featured several different stations that defenders rotated between every 90 seconds. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

A member of the 51st Security Forces Squadron secures his protective headgear prior to a combatives bout during a House of Pain training event in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2014. The confidence course featured several different stations that defenders rotated between every 90 seconds. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Members of the 51st Security Forces Squadron call out instructions to their fellow defenders engaging in combatives training during a House of Pain exercise in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2104. House of Pain mimics training used by the U.S. Marine Corps and completion is mandatory for all 51st SFS personnel. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Members of the 51st Security Forces Squadron call out instructions to their fellow defenders engaging in combatives training during a House of Pain exercise in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2104. House of Pain mimics training used by the U.S. Marine Corps and completion is mandatory for all 51st SFS personnel. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Airmen from the 51st Security Forces Squadron engage in combatives training during a House of Pain exercise in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2104. Other events in the confidence course included sprints, box jumps and “Spiderman” push-ups, each lasting for 90 seconds. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Airmen from the 51st Security Forces Squadron engage in combatives training during a House of Pain exercise in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2104. Other events in the confidence course included sprints, box jumps and “Spiderman” push-ups, each lasting for 90 seconds. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Col. Brook Leonard, 51st Fighter Wing commander, addresses defenders from the 51st Security Forces Squadron after a House of Pain exercise in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2104. Leonard commended the Airmen’s effort during the event and emphasized the importance of joint training with their ROK counterparts. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Col. Brook Leonard, 51st Fighter Wing commander, addresses defenders from the 51st Security Forces Squadron after a House of Pain exercise in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2104. Leonard commended the Airmen’s effort during the event and emphasized the importance of joint training with their ROK counterparts. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)