Start of the article on the NYT web site:
"Three of the top United States cyclists in this year's Tour de
France use a special method to enhance their performance, and it is
legal. They sleep in altitude tents or altitude rooms that simulate the
low-oxygen conditions of high altitude. This prompts the body to make
more oxygen-carrying red blood cells and can lead to improved
endurance.
The cyclists - Dave Zabriskie, George Hincapie and Levi Leipheimer
- are among the athletes featured on the Web site for Colorado
Altitude Training, which makes the tents, known as hypoxic devices.
Runners, triathletes, skiers, rowers and the Philadelphia Flyers are
among the elite athletes who espouse the virtues of the company's
altitude simulation products on the site.
But soon, the altitude tents and rooms may be banned by the World
Anti-Doping Agency, or WADA. The agency's ethics panel recently
determined that the tents and rooms violated "the spirit of sport."
The agency said it would reach a decision in September about whether to
include altitude tents and rooms on its List of Prohibited Substances
and Methods for 2007. "
Full article at:
http://www.nytimes.com/2006/07/26/sports/othersports/26altitude.html
This seems idiotic since these devices just simulate living at
altitude, which will always be legal.