However, officials insisted that runners compete in selection trials shortly before big events.

In six days, runners compete over a total distance of 420km (261 miles), 10 times the traditional marathon distance.

Runners compete on public roads which have been closed off to traffic specifically for the event.

Relay teams consist of five members and during the first four days, four of the five runners compete.

World-class international and local runners compete in a 21.0975km mi half-marathon.