None of those factors are at play over the weekend.
The attempt is backed by Nike and cynics say it’s nothing more than a marketing gimmick. The sports giant, of course, insist that it’s about how a combination of talent, training and technology can produce astounding results.
Who is running it?
Kenya’s Eliud Kipchoge, 32, last year's Olympic marathon gold medallist and former 5000m world champion, who has a PB of 2:03:05 - the third-fastest in history.
Eritrea’s Zersenay Tadese, 35, current half-marathon world record holder with 58:23 minutes
Ethiopia’s Lelisa Desisa, 26, with a marathon PB of 2:04.45.
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