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The 500 metres is an uncommon middle-distance running event in track and field and road running competitions. All-time top 25. i = indoor performance;
Existing records which predate this requirement are still extant. Athletes who pass the immediate test but are later found to have been using banned substances have their performances invalidated. In running events up to 200 m in distance and in horizontal jump events, wind assistance is permitted only up to 2.0 m/s.
The United States Marine Corps requires that all Marines perform a Physical Fitness Test (PFT) and a Combat Fitness Test (CFT) once each calendar year. The PFT is conducted between January 1 and June 30, [1] and the CFT is conducted between July 1 and December 31. [2] The same standards apply for reservists.
Indoor tracks longer than 200 meters are considered "oversized" and times are not accepted for record purposes. Indoor sprint races (50 to 60 meters) are held on level straight-aways. American athletes are successful on an international stage with many American records being at the same time world records .
The imperial distance was run until 1983, and the 500 meters was contested for only three years from 1984 to 1987 before the event was discontinued. The 1986 and 1987 races were reported to have been shorter than 500 meters, as the track was 25 inches (640 mm) per lap short in 1986. [ 1 ]
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The world record of 38.9 seconds was set by Hasse Börjes on 18 January 1970 had been manually timed and thus with a precision of only one tenth of a second. In those days, it was not yet required that a performance be automatically timed (with a precision of one hundredth of a second) in order for it to be recognised as a world record.
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