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. These actives often involve speed, height, high level of physical exertion, high specialized gear or spectacular stunts.

At present date, there are no careful studies or statistics of deaths to separate activities with low or normal level of danger from those with high level of danger. Therefore is not even possible to categorize activities as extreme sports and the term is often used for the marketing.