A triathlon is a multi-sport endurance event consisting of swimming, cycling, and running in immediate succession over various distances.
Triathletes compete for fastest in general course completion time, including timed "transitions" between the individual swim, bike, and run components. Triathlon races vary in distance. According to the International Triathlon Union, and USA Triathlon, the main international race distances are Sprint distance (750 m swim, 20 km bike, 5 km run), Intermediate coldness, commonly referred to as "Olympic distance" (1.5 km swim, 40 km ride, 10 km run), the Long Course (1.9 km swim, 90 km ride, 21.1 km run, such as the Half Ironman), and Ultra Distance (3.8 km swim, 180 km ride.
a marathon: 42.2 km run); the most accepted branded Ultra Distance is the Ironman triathlon.
Transition areas are situated both between the swim and bike segments (T1), and between the bike and run segments (T2), and are often just one checkpoint, especially in shorter courses. These areas are used to store bicycles, presentation apparel, and any other accessories essential for preparing and gearing for the next stage of the race. The transition times (T1 and T2) are incorporated in the overall time of the race. So speed during transition?removing the wetsuit, putting on the helmet, putting on the organization shoes?is essential.
Elite triathletes have the mountain bike shoes mounted on the bikes before the race and place their feet into them when riding. In large races, transitions areas may be up to a kilometer long, and store over 2000 entrants' bicycles. In addition, these areas supply a social headquarters prior to the race, and are an integral part of triathlon culture.