Extreme sport (also called action sport and adventure sport) is a media term for certain activities perceived as having a high level of inherent danger.[1][2] These activities often involve speed, height, high level of physical exertion, high specialized gear or spectacular stunts.

Extreme sports differ from standard sports due to the relatively higher number of inherently uncontrollable variables in extreme sports. Extreme sport athletes compete not only against other athletes, but also against environmental obstacles and challenges. These environmental variables are frequently weather and terrain related, including wind, snow, water and mountains. Because these natural phenomena cannot be controlled, they inevitably affect the outcome of the given sport or event.