As a Norwegian-American (partly), I was so excited by Warholm's performance that I tore a small hole in my teeshirt. I mean, there was kind of a hole starting there already, where deodorant and sweat eat away the fibers, but then I jumped up and lustily expanded it a couple centimeters at least.
Roaming around fjords all day makes people very strong. And eating lutfisk, which is a fish that marinates for days in lye until it transforms into a disgusting gelatinous mass. You'd run fast and jump obstacles, too, if that appeared on the dinner table.