High altitude training and CO2. How to breathe mountain air during simulated high altitude training


UF IND CO2 Air ScrubberCO2 level at the real high altitude in the mountains - 0,03% СO2.

Typical CO2 level in high altitude chambers, tents, rooms - 0,5% СO2

Elevated CO2 level in high altitude training chambers trigger hypercapnia symptoms and make hypoxia symptoms worse. 


High altitude training is also known as hypoxic training.

It involves exercising or living in oxygen reduced air. Altitude training at high altitude has been used by competitive athletes for many decades and it can have a significant effect on athletic performance. Simulated high altitude training  at the sea level has the same benefits as high altitude training somewhere at the mountains. For this purpose you may use high altitude training chambers or tents. High altitude training chambers or tents for sleeping are air tight. Fresh air supply in high altitude training chambers or tents is not sufficient. 


But if you really want to breathe the mountain air during high altitude training you should remember that in the mountains the air is clean and CO2 (carbon dioxide) level there is only 0,03% .

Atitude training

During sleeping in the high altitude chamber or tent one person produces(exhales) about 5,27 gallons /24 l CO2 per hour. During training in the high altitude training chambers and tents  CO2 hour production rate can be 50 gallons /240 l of pure carbon dioxide(CO2) or even more. That is why CO2 level in the high altitude training facilities in most cases reaches 0,5% or even 1% CO2. ASHRAE recommends indoor CO2 levels not exceed 0,1%.

If environments containing high concentrations of carbon dioxide during high altitude training or sleeping it can lead to hypercapnia - a condition where there is too much CO2 in the blood.

Symptoms of mild hypercapnia:

  • Headache
  • Fatigue
  • Shortage of breathe
  • Full pulse
  • Flushed skin
  • Elevation in arterial blood pressure

Elevated CO2 level during high altitude training can trigger hypoxia symptoms or make them worse. 


Though hypoxic generators or air separation units are not able to support CO2 level low, to remove the build up of carbon dioxide being produced by metabolism during high altitude training or sleeping one should use CO2 scrubber.

ALFAINTEK CO2  Air Scrubbers maintain normal ambient CO2 level in the high altitude training cambers and tents.

ALFAINTEK offers  UFM CO2  Air Scrubber with replacement cartridges for high altitude training cambers and tents.


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