U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

The Mountain Ranger Battalion non-contracted cadets participate in the Cadet Command Fitness Assessment (CCFA), consisting of 1-minute pushups, 1-minute situps, and 1-mile run. All non-contracted cadets who wish to contract will have to pass the CCFA.

U.S. Air Force Chief Master Sgt. Claus Peris, 60th Aircraft Maintenance Squadron, counts push-ups for a Tech. Sgt. Crystal Howard during the Chief’s Group push-up and sit-up challenge at Travis Air Force Base, Calif., Feb. 23, 2017. The event’s purpose was to raise money to support Travis Airmen by getting pledges and donations. (U.S. Air Force photo/Louis Briscese)

U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

Topper on the GHD situp machine

U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

YMCA staff member Caleb Fields, (foreground) times Alyas Ivery, 3, from North Riverside, as he does sit-ups, while his dad Leo, looks on. Alyas, was one of dozens of kids taking part in the YMCA Healthy Kids Day at the West Cook YMCA in Oak Park. Vincent D. Johnson~for

Sun-Times Media.

Will was the first to sit up on his own

Despite a chilly rain, more than 60 members of Team APG tested their physical, mental and emotional limits during the most recent PME Hard challenge March 31, 2017.

In teams of two, competitors had to conquer a series of running and physical drills including burpees, situps, pushups and squats.

U.S. Army photos by Amburr Reese and Amanda Rominiecki, USAG APG

U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

5/24/14, Folklife Festival, Seattle Center

via www.situp-cycle.com/2010/09/12/saskias-excellent-ride/

Einbeinige Sit-Ups

U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

Arve later som han tar sit-ups

U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

U.S. Air Force Staff Sgt. Cydney Brown, 6th Airlift Squadron does sit-ups during the Chief’s Group push-up and sit-up challenge at Travis Air Force Base, Calif., Feb. 23, 2017. The event’s purpose was to raise money to support Travis Airmen by getting pledges and donations. (U.S. Air Force photo/Louis Briscese)

U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

U.S. Army Reserve Soldiers from the 200th Military Police Command's headquarters company participate in the Army Physical Fitness Test, May 14, during battle assembly at Fort Meade, Maryland. (U.S. Army photo by Master Sgt. Michel Sauret)

Sit-Down Sit-Up Gym proves to be 10 times more effective than regular crunches - the most effective exercises for trimming, toning and strengthening your abs

U.S. Army Explosive Ordnance Disposal Instructors demonstrate the situp portion for the Army Physical Fitness Test at Fort A.P. Hill, Va., Sept. 11, 2017. The U.S. Army Ordnance Crucible is a three-part competition, composed of the Ammunition Transfer Holding Point (ATHP) Team of the Year, Combat Repair Team (CRT) Team of the Year, and Explosive Ordnance Disposal (EOD) Team of the Year.

(U.S. Army photo by Pfc. Kyara Aguilar)