[hn_throwaway_99]

Don't think you read the link. It talks about CO rebreathing as an analytics tool, and then specifically talks about a more aggressive method to increase performance:

> A second, more aggressive approach, which is called carbon monoxide inhalation and uses the same equipment and techniques, steps into the scientifically new and much riskier realm of inhaling the poisonous gas for the express purpose of performance enhancement. A growing body of recent scientific research suggests CO inhalation can have a powerful impact on measures of aerobic capacity like VO2max, or maximal oxygen uptake.

[sorenjan]

And the teams say that they only use it to analyze blood values during altitude adaptation. As the article mentions, the technique isn't new, so why imply that teams are using it for nefarious purposes?

> And there is no hard evidence that any WorldTeams are currently using CO inhalation for performance gains. But multiple sources for this article voiced concern that it might be imminent, and possibly already happening in cycling or other sports.

To go from that to "people dope now with CarbonMonoxide" is dishonest.

[4ggr0]

> And the teams say

i think it's equally as dishonest to believe anything these teams say about topics which relate to doping, performance enhancements etc.

of course not a single team says that they're using these methods to get performance gains, why on earth would they admit it?