Robert Bosch, Extreme Photographer

A history of the sports was published in 2004. Amped: How Big Air, Big Dollars and a New Generation Took Sports to the Extreme. The book provided an overview of the history, culture, and business of the sports and included interviews with athletes, company owners, and marketers.
• Marketing
Some contend, that the distinction between an extreme sport and a conventional one has as much to do with marketing as it has to do with perceptions about levels of danger involved or the amount of adrenaline generated. Furthermore a sport like rugby union, though dangerous and adrenaline-inducing, would not fall into the category of extreme sports due to its traditional image, and it does not have certain things that other extreme sports do, such as high speed and an intention to perform stunts. Demolition derby racing, predominantly an adult sport, is not usually thought of as 'extreme' while BMX racing, a youth sport, is.
In addition to the generational divide, one true hallmark of an extreme sport is a counter-cultural aura—a rejection of authority and the status quo by disaffected youth. The youth of Generation Y have seized upon activities which they can claim as their own, and have begun rejecting more traditional sports in increasing numbers.