Top Definition
One of the thoughest sports in the world. It consists of Run Bike Run.
The mekka of Duathlon is a rcae in Switzerland called Powerman Zofingen, only for the though guys and gals out there. Its 10k Run 150 Bike and 30 k run. If you wanna be though you should do this race.
Powerman Zofingen
by K January 26, 2004

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