Extreme sports (also called action sport and adventure sport) is a media term for certain activities perceived as having a high level of inherent danger. These activities often involve speed, height, high level of physical exertion, highly 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. It is instead used as a marketing term in promoting events such as the X Games.