Who was the first person to complete a marathon in under two hours and why wasn't it recognized as an official world record?
In 1964, Derek Clayton ran a marathon in 1:59:41, becoming the first person to break the two-hour barrier. However, his record was not officially recognized by the IAAF because the course was not certified and there were no timekeepers present at the start.
According to the IAAF, a marathon course must be measured by an official course measurer, and there must be timekeepers present at the start and finish lines. In Clayton's case, the course was not certified, and there were no timekeepers present at the start.
Clayton's record remained unrecognized for many years, but in 2021, the IAAF finally ratified it as the first sub-two-hour marathon. However, it is still not considered an official world record because it was not run on a certified course.
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