Triathlon races can cover a variety of distance, with the Olympic distances set at a 1.5km swim, 40km bike ride and 10km run. Triathletes compete to win with the lowest overall completion time, which includes time transitions between each event, which can involve changing clothes and collecting equipment or accessories.
Triathlon is considered by most to have arisen in France during the 1920's, from a race called 'Les trois sports' which was held annually near Joinville-le-Pont.
The first modern event as we know it, to be named a 'triathlon' was carried out in San Diego in September 1974, and 46 competitors took part. The sport made it's debut at the Olympic Games in the Sydney games of 2000.
The NGB for Triathlon in Great Britain is the British Triathlon Federation, which is comprised of representatives from Wales, Scotland and England Triathlon bodies.