Which method is commonly used to measure speed?

The common method used to measure speed involves utilizing timing gates or stopwatches. These tools provide precise measurements of the time it takes for an individual to complete a set distance. Timing gates, which can automatically start and stop as an athlete moves through them, enable accurate timing without the human error that might occur when using a stopwatch. This method is essential for assessing athletic performance in various sports where speed is a critical factor.

Other methods, such as using a pulse monitor, are designed for measuring heart rate rather than speed. Visual inspection lacks the precision necessary for accurate measurement, and while heart rate measures can give insights into an athlete's exertion level, they do not directly correlate to the speed at which a person is moving. Thus, timing gates or stopwatches stand out as the most effective and reliable tools for assessing speed in fitness and athletic contexts.