'Science, desire & heart' - How to run a marathon in 1:59

Team Ineos discuss the factors that could prove to be the difference for Eliud Kipchoge as he attempts to run a marathon in under two hours in Vienna, Austria this Saturday.

It will be the Kenyan's second attempt at becoming the first person in history to run a marathon in one hour 59 minutes.

Watch live coverage of the 1:59 Challenge, Saturday 12 October, 07:00-09:30 BST on the BBC Red Button, BBC iPlayer, BBC Sport website & app.

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