A triathlon is a multisport race with three continuous and sequential endurance races.The word is of Greek origin, from τρεῖς or treis (three) and ἆθλος or athlos (competition).
While variations of the sport exist, the most common form includes swimming, cycling, and running over various distances. Triathletes compete for fastest overall course completion, including timed transitions between the three races.
A transition area is set up where the athletes change gear for different segments of the race. This is where the switches from swimming to cycling and cycling to running occur. These areas are used to store bicycles, performance apparel, and any other accessories needed for the next stage of the race. The transition from swim to bike is referred to as T1 and that between the bike and run is referred to as T2. The athlete's overall time for the race includes time spent in T1 and T2.Transition areas vary in size depending on the number of participants expected. In addition, these areas provide a social headquarters before the race.
The nature of the sport focuses on persistent and often periodized training in each of the three disciplines, as well as combination workouts and general strength conditioning.