This improves the oxygen-carrying potential during the blood, making it possible for the cardiovascular system to a lot more properly transportation oxygen for the muscles, blocking lactic acid buildup. USADA led the investigation into Armstrong's doping tactics. In 2012, they introduced a comprehensive report detailing evidence of Armstrong's violations. The https://abcnews.go.com/US/lance-armstrong-doping-investigation-widens/story?id=13663557