The general format of a triathlon competition consists of three sequential disciplines: swimming, cycling, and running. Athletes start with the swim segment, typically in a body of water, followed by a transition to the cycling phase where competitors cover a designated distance on bicycles. After the cycling portion, athletes transition again to the running segment, which concludes the event. Distances can vary depending on the specific type of triathlon, such as sprint, Olympic, or Ironman, providing a range of challenges for participants of different skill levels.