A "long course" typically refers to a type of swimming competition that takes place in a pool measuring 50 meters in length. This format is used in various events, including the Olympics and World Championships, allowing swimmers to compete in longer distances without the need for turns, which can affect their speed and technique. In addition to swimming, the term "long course" can also apply to other sports, such as triathlons or marathons, where the distance of the race is longer than standard distances. These events challenge athletes' endurance and stamina, requiring extensive training and preparation.