Why Are Xenon And Argon Banned In Sports?

Back in 2014, Xenon and Argon became the latest additions to the list of chemicals and supplements banned by the World Anti-Doping Agency (WADA) – an entity that runs drug testing across many sporting events. The decision was seen as an unusual one, as people thought that the idea of doping with gases that were commonly associated with neon light, arc welding, and anesthesia was a little weird.

However, the ban was actually enforced, as noble gases Xenon and Argon were added to WADA’s list of Prohibited Substances and Methods.


(From L-R) Lance Armstrong, Gay Tyson, Maria Sharapova, Diego Maradona

We do know that Performance Enhancing Drugs positively affect an athlete’s performance in a sport (we have discussed PEDs in this article). But how do noble gases like Xenon and Argon boost a player’s performance? What do these so-called noble gases do to athletes that has made the WADA ban them from the theater of sports?

Before we get to that, we need to first discuss noble gases in general.

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What are noble gases?

The chemical elements of the 18th group of the periodic table are known as noble gases. These elements are all gases, including helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).

Noble gases in Periodic Table

The noble gases (Photo Credit : Sandbh / Wikipedia Commons)

The reason they are called ‘noble gases’ is that they are truly noble. In less cryptic terms, it implies their unusual non-reactivity. To be more scientifically specific, noble gases have filled outer electron shells, which makes them quite less inclined to the idea of reacting with other elements at normal pressures and temperatures. This is why they very rarely form compounds with other elements.

It’s interesting to note that when the members of the 18th group were first discovered, they were believed to be awfully rare, as well as chemically inert. That’s why they have also been called ‘rare’ or ‘inert’ gases.

I have telling noble gas jokes there’s never a reaction meme

Biological effects of noble gases

Some noble gases are well known to be biologically active due to their analgesic, sedative and hypnotic properties. This, in addition to the fact that they are mostly inert under normal pressure and temperature conditions, makes noble gases quite useful in many situations/settings.

For instance, common inhalation anesthetics are known to have certain disadvantages, including decreased cardiac output, toxicity etc. In contrast, xenon (a noble gas) also has anesthetic properties, minus the aforementioned disadvantages.

Why are Xenon and Argon banned in sports?

Being amazingly bioactive, Xenon is found to marginally increase the oxygen-carrying capacity of human blood. The same is true for Argon.

You might already know that our cells need to maintain proper oxygen levels to maintain their aerobic metabolism and energy generation. Xenon and Argon help in the latter in a very smart way (Source).

Xenon is one of the few agents that are known for their ability to activate the production of HIF-1α, which triggers other proteins to rush to the rescue of oxygen-deprived tissues. One of those proteins is erythropoietin (EPO), which is basically a hormone that boosts the formation of red blood cells in the bone marrow.

Athlete inhaling football player

Inhalation of xenon and argon has been found to increase erythropoietin levels in healthy individuals, which, in turn, boosts their stamina and energy levels. (Photo Credit : Flickr)

What it really does is stimulates low-level hypoxia (a condition wherein there is a deficiency in the amount of oxygen reaching the tissues). This, in turn, stimulates the body to produce blood so that it does a better job of taking in oxygen. If I have to say the same thing in technical terms, I’d say that the inhalation of xenon increases erythropoietin (EPO) levels, a hormone that increases the oxygen-carrying capacity of the blood by encouraging the formation of red blood cells. It should be noted that, due to the same characteristic, synthetic EPO is used to treat patients with kidney diseases and anemia.

Thus, inhaling Xenon or Argon could boost your stamina and energy, thereby giving you an unfair advantage over other competing athletes. In addition to that, another major advantage that these noble gases offer is that they ‘clear out’ from the body within hours, but their performance-enhancing effects can last for days.

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About the Author

Ashish is a Science graduate (Bachelor of Science) from Punjabi University (India). He spearheads the content and editorial wing of ScienceABC and manages its official Youtube channel. He’s a Harry Potter fan and tries, in vain, to use spells and charms (Accio! [insert object name]) in real life to get things done. He totally gets why JRR Tolkien would create, from scratch, a language spoken by elves, and tries to bring the same passion in everything he does. A big admirer of Richard Feynman and Nikola Tesla, he obsesses over how thoroughly science dictates every aspect of life… in this universe, at least.

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