Which test best measures speed?

The 40 yard sprint is recognized as an effective measure of speed because it specifically assesses an individual's acceleration and maximum velocity over a short distance. This test focuses on the initial rapid burst of speed that is critical in various tactical and athletic situations, making it particularly relevant for sports that require quick, explosive movements.

In contrast, longer distance runs such as the 200 meter, 300 meter, and 1 mile runs primarily evaluate aerobic endurance and overall running performance over extended distances rather than pure speed. These tests incorporate factors such as stamina and pacing, which are less relevant when focusing solely on assessing how quickly an individual can cover a short distance. The brief nature of the 40 yard sprint allows for a concentrated measurement of the athlete's ability to reach top speed in minimal time, thus making it the most suitable option for measuring speed directly.