11/12/2025
ALTITUDE MASKS: Do these masks simulate training at altitude or improve VO2 Max? The short answer…no.
These altitude masks restrict airflow and challenge the respiratory muscles but do not change the percentage of oxygen in the air so capillary bed density and red blood cell production aren’t effected.
This type of restriction training might be useful for people with asthma or emphysema, where getting the air into the body is the limiting factor. For most healthy people, however, the limiting factor is not how much air they can breath in but rather gas exchange at the level of the alveoli…and this does little for that. It has been studied and these masks do not increase VO2 Max.
The only real benefit for an otherwise healthy person who doesn’t have asthma or emphysema is that these masks might train the diaphragm a bit more. This could be useful to cue proper breathing technique for people who are paradoxical breathers and are using accessory muscles of breathing but otherwise, this is goofy looking gimmick and not really a useful training tool.
You can do a literature search to read the studies or just do a simple google AI search “Do altitude masks imrove VO2 Max” to find out more.
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