1500 metres
The 1500 metres is a middle-distance track race covering three and three-quarter laps of a standard 400-metre track. Runners combine speed, aerobic endurance, and tactical positioning.
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Ashton EatonRelated: The decathlon's final event tests endurance after nine disciplines.
Mary DeckerRelated: Decker won the 1,500-metre world title in 1983 and set records at the distance.
Genzebe DibabaRelated: Dibaba won the 2015 world title in this event.
Bob MathiasRelated: The decathlon's final event tested endurance after nine other competitions.