The United States Marine Corps requires that all Marines perform a Physical Fitness Test (PFT) and a Combat Fitness Test (CFT) once each calendar year. Each test must be held at an interval of six months. The same standards apply for reservists. The PFT ensures that Marines are keeping physically fit and in a state of physical readiness. It consists of pull-ups or push-ups, planks, and a 3-mile run. On October 1, 2008, the Marine Corps introduced the additional pass/fail CFT to the fitness requirements. The CFT is designed to measure abilities demanded of Marines in a war zone.