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Updated: Jun 9, 2025

Author Spotlight: Integrating Alveolar-Capillary Reserve Measurements in Exercise Adaptation and Therapeutic Strategies
Published on: February 2, 2024
Low-dose carbon monoxide inhalation to increase total hemoglobin mass and endurance performance: scientific evidence
Hannes Gatterer1,2, Tobias Dünnwald2, Simon Woyke3
1Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy.
Abstract:
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.
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