Low-dose carbon monoxide inhalation to increase total hemoglobin mass and endurance performance: scientific evidence and implications.

Recently, chronic intermittent inhalation of low-dose carbon monoxide (CO) has been postulated as a practice to increase total hemoglobin mass with potential beneficial effects on endurance performance. In this perspective article, we discuss the potential performance enhancing capabilities as well as the safety concerns, which include individual variability in CO response, and acute and chronic health effects. It is also important to note that according to the World-Anti-Doping-Agency (WADA), CO inhalation could fall under " M1. Manipulation of Blood and Blood Components " and therefore could be considered a prohibited method if used as a non-diagnostic tool.
Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision.
(Copyright © 2024 Gatterer, Dünnwald, Woyke, Faulhaber, Schumacher and Schobersberger.)