Normaborical hypoxytherapy - Mountain air - inhalation through a special obverse mask the gas mixes containing not less of 10 % of oxygen and 90 % of nitrogen.
One minute of breath at normal ventilation of lungs "rises" under the maintenance of oxygen in blood approximately on 1000 m, and for 5 minutes - up to 5000-5500 m. In practice of 3-5 minutes of breath replace 3-5 minutes of breath by atmospheric air - "returning" to a sea level.
