The governing body of cycling banned a strange method of cheating: repeatedly inhaling carbon monoxide. Yes, the deadly gas.

Objective To characterise the time course of changes in haemoglobin mass (Hbmass) in response to altitude exposure. Methods This meta-analysis uses raw data from 17 studies that used carbon monoxide ...

Cycling's governing body has banned the repeated use of carbon monoxide rebreathing that some ... of oxygen in the lungs or the total mass of hemoglobin, a key blood value for racers.

The use of carbon monoxide was put in the spotlight during the Tour de France when the cycling website Escape Collective reported that riders from multiple teams inhaled the toxic gas to optimize ...