The UCI wants to make sure riders don't get sick huffing carbon monoxide to improve performance with their latest ban.

Carbon monoxide (CO) is an odorless, colorless gas that kills without warning. According to the Centers for Disease Control ...

(Hemoglobin shuttles oxygen to the tissues and carbon dioxide back out to the lungs ... by proteins known as transcription factors, which bind to the regulatory DNA, thereby generating ...

The carbon dioxide in smoke, just like car fumes, binds to hemoglobin in red blood cells and displaces oxygen. In hearts with partially plugged arteries that produce pain known as angina ...