Which of the following tests is used to measure lateral speed and agility?

The test that effectively measures lateral speed and agility is the Agility Shuttle Run. This test specifically focuses on an individual’s ability to change direction quickly while running, which is a critical component of agility. During the Agility Shuttle Run, participants are required to sprint back and forth between markers placed at set distances, incorporating lateral movements. This not only assesses speed but also the athlete's coordination and overall agility, making it a comprehensive measure of lateral quickness.

While the other tests listed serve different purposes, they do not focus specifically on lateral speed and agility. The vertical jump test evaluates vertical power and strength, the Lower Extremity Functional Test (LEFT) assesses dynamic balance and functional mobility rather than speed and lateral movement, and balance tests primarily measure static and dynamic stability rather than the quick directional changes essential for agility. Thus, the Agility Shuttle Run stands out as the most appropriate test for assessing lateral speed and agility.