UCI Bans Repeated Carbon Monoxide Inhalation, CO Hb Mass Testing OK Once or Twice

In 2024, the biggest news in the world of cycling doping sounded like an April Fool’s joke. Pro riders were apparently inhaling carbon monoxide to boost performance. That sounds preposterous until you realize that carbon monoxide rebreathing can be used as a measurement tool to measure a rider’s hemoglobin (Hb) mass and blood volume. But […]