Track-and-field competitions, also known as athletics, are sporting events that involve running, jumping, throwing, and walking. They are usually held outdoors on a track or field, and involve individual athletes or teams competing against each other in a variety of events. The most common events include sprints, middle-distance races, long-distance races, hurdles, relays, and the triple jump. Competitions are held at all levels, from local to international, and are an important part of the Olympic Games.