` Extreme sports is a popular term for certain activities perceived as having a high level of inherent danger. These activities often involve speed, height, a high level of physical exertion, and highly specialized gear. The definition of an extreme sport is not exact and the origin of the term is unclear, but it gained popularity in the 1990s when it was picked up by marketing companies to promote the X Games. While use of the term "extreme sport" has spread far and wide to describe a multitude of different activities, exactly which sports are considered 'extreme' is debatable. There are however several characteristics common to most extreme sports. While not the exclusive domain of youth, extreme sports tend to have a younger-than-average target demographic. Extreme sports are rarely sanctioned by schools. Extreme sports tend to be more solitary than traditional sports . In addition, beginning extreme athletes tend to work on their craft without the guidance of a coach. Activities categorized by media as extreme sports differ from traditional sports due to the higher number of inherently uncontrollable variables. 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 activity or event. Wikipedia [ - ]

` Extreme sports is a popular term for certain activities perceived as having a high level of... [ + ]