Jasper Krommenhoek followed Kjeld Nuis's example
◆1 source
Jasper Krommenhoek, 22, was inspired by seeing Kjeld Nuis climb an Italian mountain when he was a child. He then persuaded his parents to take him to the Woldberg, a wooded, 26-metre-high embankment near Steenwijk, where he began running up and down repeatedly.