谁给我一个关于extreme sport的英文材料啊？求助！！！！

An extreme sport (also called action sport, adventure sport, and adventurous sport) is any sport or physical activity with a very high level of danger and often involve speed, height, high level of physical exertion, highly specialized gear or spectacular stunts. A feature of such activities in the view of some is their alleged capacity to induce a adrenaline rush in participants (a misnomer, since often the rush or high obtained is a product of increased levels of dopamine endorphins and serotonin). Furthermore, a recent study suggests that the link to adrenaline and 'true' extreme sports is tentative. The study defined 'true' extreme sports as a leisure or recreation activity where the most likely outcome of a mismanaged accident or mistake was death. This definition was designed to separate the marketing hype from the activity. Another characteristic of activities so labeled is they tend to be individual rather than team sports. Extreme sports can include both com