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OSLO, NORWAY - MAY 23: An athlete running trough the city at Ecotrail Oslo on May 23, 2015 in Oslo, Norway. Ecotrail Oslo is a 80k ultratrail that goes trough the green areas and past several of the landmarks in the city. (Photo by Kai-Otto Melau/Getty Images)

OSLO, NORWAY - MAY 23: An athlete running trough the city at Ecotrail Oslo on May 23, 2015 in Oslo, Norway.  Ecotrail Oslo is a 80k ultratrail that goes trough the green areas and past several of the landmarks in the city.  (Photo by Kai-Otto Melau/Getty Images)