Lance Cpl. Tim D. Dueker, motor transport operator, Truck Company, Marine Expeditionary Force Headquarters Group, I MEF (Forward), keeps a calm face during the ammunition-can press portion of the Combat Fitness Test here Oct. 9, 2008. Dueker and the other Marines in the company were the first group in the forward deployed MHG element to take the test for an official score during the CFT's initial phase-in period. The CFT events combine muscle, agility and endurance to measure anaerobic fitness. Anaerobic exercise reflects conditions in combat, where there are brief moments of high-intensity output, and aerobic is more about a sustained steady pace. - Lance Cpl. Tim D. Dueker, motor transport operator, Truck Company, Marine Expeditionary Force Headquarters Group, I MEF (Forward), keeps a calm face during the ammunition-can press portion of the Combat Fitness Test here Oct. 9, 2008. Dueker and the other Marines in the company were the first group in the forward deployed MHG element to take the test for an official score during the CFT's initial phase-in period. The CFT events combine muscle, agility and endurance to measure anaerobic fitness. Anaerobic exercise reflects conditions in combat, where there are brief moments of high-intensity output, and aerobic is more about a sustained steady pace.