What is Duathlon?
Duathlon is a multi-sport consisting of running, followed by cycling, followed by running.
At elite level the cycling is draft legal. Races are continuous with no break between the two disciplines. The ITU Duathlon World Championships consist of a 10km run, 40km cycle, 5km run.
Races can be held on road or cross-country (the latter being a combination of mountain biking and trail running).
Britain hosted the 2010 GE Edinburgh ITU Duathlon World Championships - see the official site.
The start of the ETU European Championships in Nancy, 2009