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The triathletes pushing Ironman to the limit
In 1954, Roger Bannister broke the four minute mile. In 2019, Kenya鈥檚 Eliud Kipchoge ran a sub two hour marathon.
But what鈥檚 left to test human endurance?
British triathletes Alistair Brownlee and Lucy Charles-Barclays are attempting to accomplish something that has never been done before in the world of Ironman.
Sportshour鈥檚 Katie Smith has more.
Photo: Lucy Charles-Barclay celebrates winning an Ironman (Credit: Getty Images)
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