Ultra-triathlon can be defined as a distance longer than one full-length triathlon. One full-length triathlon is 3.8 km of swimming, 180 km of cycling and 42.2 km of running. Ultra-triathlon is known in two different formats - "continuous" and "day-by-day". In the "Continuous" format, all three disciplines are done continuously one after the other and the time does not stop before the end of the last discipline (i.e. run). The "day by day" format means one full-length triathlon on each consecutive day.