The distances vary depending on the format: XS (400m / 10km / 2.5km), S (750m / 20km / 5km), M (1.5km / 40km / 10km), L (3km / 80km / 20km), XL (4km / 120km / 30km) and the legendary Half Ironman and Ironman.
It is not necessary to be an elite swimmer, but being comfortable in the water is essential. Most triathlons are in open water, so it is important to practice swimming in a lake or the sea if possible. Specific pool training is also very useful.
The average time for an M format triathlon is generally between 2h30 and 3h30, depending on the athlete's level, race conditions, and the course profile.
An Ironman is the longest triathlon format. It consists of a 3.8 km swim, 180 km bike, and 42.195 km run (a marathon). It is one of the most difficult endurance challenges in the world.
The basic equipment for a triathlon is a swimsuit or a triathlon suit, swimming goggles, a bike (road or triathlon), a certified helmet, and running shoes. For long formats, on-board nutrition is essential.
Most triathlons allow non-licensed participants to take part by purchasing a "day pass" from the French Triathlon Federation (FFTRI) and providing a valid medical certificate. It is important to check the registration conditions for each event.