Cyclists at Tour de France in the 1920s smoking cigarettes. It was thought cigarette smoking expanded the lungs and helped with endurance. : r bicycling The E Cigarette Industry, Waiting to Exhale The New York Times Navigating E Cigarette Regulations: Bringing Your E Cigarette to Hong Kong Quel wattage choisir pour vapoter ? Rglages selon votre rsistance Guest commentary: Use of e cigarettes may undermine state's progress on smoking East Bay Times