Robert Bosch, Extreme Photographer

The implication of the phrase was that the word "sport" defined an activity in which one might be killed. The other activities being termed "games". The phrase may have been invented by either writer Barnaby Conrad or automotive author Ken Purdy.
In recent decades the term extreme sport was further promoted by X Games, a multi-sport event created and developed by ESPN. The first X Games (known as 1995 Extreme Games) were held in Newport, Providence, Mount Snow, and Vermont in the United States.
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.