The present invention relates to a gaseous composition inhalable comprising oxygen, as well as a mixture of inert gas, characterized in that said mixture of inert gases, comprises: - a first compound chosen from among argon, xenon, and having properties hyperthermic and - a second compound to the properties hypothermic, the said mixture of inert gases, comprising the proportions of the first compound and the second compound, such that the said mixture of inert gas is hypothermic.
