Olympic triathlons are comprised of a 1,500m open water swim, 40km of cycling, and a 10km run. Both men and women compete over the same distance.
All the swimming strokes are permitted. At the end of the swim, and as well as the cycle portion, race competitors must pass through a ‘transition zone’, where they may change clothing and footwear if they wish. From the swim to the cycle, competitors are not allowed to mount their bikes until outside this zone. At the end of the cycle they must dismount before entering the transition zone.
Drafting (riding in the slipstream of another cyclist), is permitted.
There are no heats: both the men’s and women’s final events consist of a single race.