Marathons, ultras, multi-stage races, FKTs – ultrarunner Kristina Madsen has a diverse race CV and the records to prove it. In 2018, the Danish runner set a fastest known time record (FKT) for her ascent of Mount Kilimanjaro, completing it in 6 hours 52 minutes despite living in the relative flatlands of Denmark. And despite being a trail runner first and foremost, a few weeks ago she won the World Marathon Challenge outright, setting a new world record for running 7 marathons on 7 continents in 7 days.

How does she do it? From training for her Kilimanjaro FKT and last year’s 66-mile Bob Graham Round to her meticulous approach to race prep, we cover it all below.