Why you should use the Agility T-Test as part of your late stage injury rehabilitation assessment. The Agility T-Test is a test that is commonly used to assess an athletes/individuals to move forwards, backwards and side to side. It is performed on a safe and consistent surface to ensure that test-retest reliability is high. Besides testing an individual's ability to move in all directions as quick as possible it also tests a “combination of leg speed, leg power, and agility for performance” (Pa