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Additionally, high-school competition is conducted under slightly different rules, which have evolved over time. For example, in 1980, high schools converted their running distances from Imperial (yards) to metric, but instead of running conventional international distances like 1500 metres in place of the mile run, a more equitable but non ...
Road race times are only considered accurate to a full second. To distinguish a full second time with hours, from a minute time with hundredths of a second, colons are used to separate hours from minutes, and minutes from seconds. A period is used to separate seconds from hundredths of a second. Transponder timing is becoming more common. The ...
In college, the typical runner of this event would convert to the 5,000-metre run, or potentially the 3,000-metre run during the indoor season. While World Athletics does not recognize an official world record or world best in the 3200 metres, the two mile run can be used as an approximation.
Webb was technically still in high school at the time, but the NFHS only recognizes the race against other high school competitors. Several other high schoolers have run faster than Griffith's 3:57.08 1600m, including Gary Martin (3:57.98 mile, 3:56.60 1600m) in 2022 and Jim Ryun (3:58.3 mile, 3:56.92 1600m) in 1965.
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Tyson Gay currently holds the national record for the 100 m.. The following are the national records in track and field in the United States. Some of the records are maintained by USA Track & Field (USATF).
These are the current records in the various age groups of masters athletics for United States competitors. Starting at age 35, each age group starts on the athlete's birthday in years that are evenly divisible by 5 and extends until the next such occurrence.
The time-to-digital converter measures the time between a start event and a stop event. There is also a digital-to-time converter or delay generator. The delay generator converts a number to a time delay. When the delay generator gets a start pulse at its input, then it outputs a stop pulse after the specified delay.