In response to Runners World, the average 5km finish time in the UK (an equal distance to a Parkrun) is 33 minutes and 54 seconds. For males it is 29:08 and women 38:12. Completing a marathon in less than two hours required Kipchoge to run 5km in 14:13, eight instances in a row. Equally, the 10,000m (10km) male world record sits at shade over 26:17 and Kipchoge needed to repeatedly run 28:26. A 1:59:59 marathon is the equivalent of running 100m sprints in just over 17 seconds - 422 times in a row. Carbohydrates are key to sustained efficiency in endurance sports activities - and marathon running is no different. In preparing for the try, the organisers created a window (October 12 to October 20) when the run may happen. This uncertainty meant Kipchoge's meals preparations couldn't start early. Stephen Mears, a lecturer in sports and train nutrition at Loughborough University, said earlier than the attempt.

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