Which fitness test is conducted at the beginning of Phase 1?

The Army Physical Fitness Test (APFT) is the correct answer because it is designed to assess the physical fitness level of soldiers in the Army. Conducting this test at the beginning of Phase 1 serves multiple important purposes, such as establishing a baseline for each participant's physical capabilities, identifying areas that may need improvement, and ensuring that all candidates meet the necessary physical standards required for the demands of the training ahead. The APFT typically consists of components like push-ups, sit-ups, and a timed two-mile run, which comprehensively evaluate strength, endurance, and overall fitness.

In contrast, the other tests listed are not standard for assessing initial fitness levels in this specific context. The Combat Fitness Test focuses more on combat-related physical tasks, while the Endurance Fitness Test may not be universally recognized within the Army's training structure. The Physical Readiness Test is an older designation that has been largely replaced by the APFT in many contexts. Therefore, the APFT's structured approach to assessing fitness makes it the appropriate choice for the initial evaluation at the start of Phase 1 in the Sabalauski Air Assault School.