What is a triathlon and how does it work?

A triathlon is a multi-sport endurance event that consists of three continuous and sequential disciplines: swimming, cycling, and running. It tests athletes' physical fitness, mental stamina, and endurance. The event begins with a swim, usually in open water such as a lake or ocean, where participants navigate a predetermined distance. Upon completion, athletes transition to the cycling phase, typically performed on road bikes or triathlon-specific bikes. They cover a specified distance on a course made up of roads or trails. After the cycling leg, competitors transition to the final discipline, running. Participants race on foot over a designated distance, often on pavement or trails. The event ends when athletes cross the finish line. Triathlons can vary in distance, with the most common being sprint, Olympic, half Ironman, and Ironman distances.