Device for acclimatising at altitude and method for functioning this device

An acclimatization device for acclimatizing at altitude, comprising:

• a breathing mask defining a confined air space when it is placed on the face of a user, the mask comprising:
• a suction valve to let the surrounding air enter inside the confined space when breathing in;
• an expiration valve to let the air exit with a determined resistance, so as to create an overpressurisation of air in the confined space, when breathing out;
• a sensor to establish pressure information about a pressure of the confined air space;
• and
• a processing unit for processing the pressure information and configured to
• establish, from the pressure information, breathing characteristics of the user, and
• compare the breathing characteristics of the user, respectively, to at least one target value, to determine an adjustment of a breathing mode of the user,
• wherein
• the acclimatization device is configured to provide the user with a recommendation of the adjustment of the breathing mode to the user, and
• the breathing characteristics include the maximum pressure in the confined space when breathing out of a target value of between 8 and 12 cmH2O, the duration of breathing out of a target value of between 3.5 and 4.5 seconds, and the duration of breathing in of a target value of between 1.5 and 2.5 seconds.