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| rdfs:comment | - The 40-yard dash is a sprint covering 40 yards (36.576 m), designed to measure running speed. It is primarily run to evaluate the speed of football players by scouts, particularly for the NFL Draft but also for collegiate recruiting. The method of timing a 40-yard sprint can affect the accuracy by as much .5 seconds (with the manual stopwatch method). The best methods of timing are lasers which start and stop the times when passed through.
- The origin of timing football players for 40 yards comes from the average distance of a punt and the time it takes to reach that distance.[citation needed] Punts average around 40 yards in distance from the line of scrimmage, and the hangtime (time of flight) averages approximately 4.5 seconds. Therefore, if a coach knows that a player runs 40 yards in 4.5 seconds, he will be able to leave the line of scrimmage when a punt is kicked, and reach at the point where the ball comes down just as it arrives.
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| abstract | - The 40-yard dash is a sprint covering 40 yards (36.576 m), designed to measure running speed. It is primarily run to evaluate the speed of football players by scouts, particularly for the NFL Draft but also for collegiate recruiting. The method of timing a 40-yard sprint can affect the accuracy by as much .5 seconds (with the manual stopwatch method). The best methods of timing are lasers which start and stop the times when passed through.
- The origin of timing football players for 40 yards comes from the average distance of a punt and the time it takes to reach that distance.[citation needed] Punts average around 40 yards in distance from the line of scrimmage, and the hangtime (time of flight) averages approximately 4.5 seconds. Therefore, if a coach knows that a player runs 40 yards in 4.5 seconds, he will be able to leave the line of scrimmage when a punt is kicked, and reach at the point where the ball comes down just as it arrives.
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