The Illinois agility test is a physical fitness assessment designed to measure an individual's agility and speed. It involves a series of sprints and directional changes over a defined course, typically set up in a rectangular shape. Participants start from a prone position, sprint to a series of cones, weave through them, and return to the starting point as quickly as possible. This test is commonly used in various sports and physical education programs to evaluate athletic performance. It helps coaches and trainers identify areas for improvement in agility, which is crucial for many sports, including basketball, soccer, and football.