French cyclist Lara Lallemant (R) takes part in a training session with a Cycling Federation sport scientist, French Iris Sachet, as she studies her physiological profile, to feed research on high performance atheletes and prepare the French athletes for the 2024 Olympic Games of in Paris, at the French National Velodrome of Saint-Quentin-en-Yvelines on January 31, 2024. Athlete profiling, 3D scans of the velodrome, twin mannequins, artificial intelligence and marginal gains: French cycling is banking on the hard sciences to shine at the Paris Olympics and take on the Anglo-Saxon pioneers at their own game. (Photo by Thomas SAMSON / AFP).
A year after controversy erupted over the use of carbon monoxide rebreathers by some of professional cycling's top teams, the World Anti-Doping Agency (WADA) has added the use of the gas as a performance-enhancing method to its Prohibited List, starting in 2026.
"The non-diagnostic use of carbon monoxide (CO) was added to the Prohibited Methods as a new section, M 1.4," WADA stated in its summary of the major modifications to the Prohibited List. "It can increase erythropoiesis under certain conditions."
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