The two-hour marathon, also referred to as the sub-two-hour marathon, is the physical and psychological barrier of completing the marathon, a distance of 42.195 kilometres (26.219 mi), in under two hours. Originally thought to be impossible, various attempts have been made to break the mark since the marathon distance was defined in the early 20th century.
The two-hour marathon, also referred to as the sub-two-hour marathon, is the physical and psychological barrier of completing the marathon, a distance of 42.195 kilometres (26.219 mi), in under two hours. Originally thought to be impossible, various attempts have been made to break the mark since the marathon distance was defined in the early 20th century.
Source: Wikipedia "Two-hour marathon" · CC BY-SA 4.0
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