Ultraworld in Turmoil: First Ever Sub-6 Hours for 100 Kilometers
An average speed of 16.7 kilometers per hour, an average pace of 3:35 per kilometer – and sustained for a full 100 kilometers. South African athlete Sibusiso Kubheka has shaken up the ultrarunning world by breaking the magical six-hour barrier for the distance, clocking 5:59:20. With this performance…
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