Rachel Entrekin's time of 56 hours, nine minutes and 48 seconds set a new overall course record

The key to breaking a course record for a 250-mile ultramarathon?

Mashed potato, and 19 minutes' worth of sleep on the ground.

That is what fuelled Rachel Entrekin in her historic run at the Cocodona 250 in Arizona as the American won the overall race - men included - in a record-breaking time of 56 hours, nine minutes and 48 seconds.

"Somewhere around mile 200, I slept for five minutes at an aid station," said the 34-year-old, speaking to BBC Sport the morning after her success.