However, if you go through the article and look at the sources I found one quoted source that had to do with potential problems with masks. This is where it becomes important to understand how to read scientific literature because the population that was studying were patients in renal failure on dialysis... I'm not sure about you, but I don't think results from people with organ failure can be applied to healthy teenagers. The rest of the sources are either textbooks on exercise physiology, which doesn't examine hypoxia from masks or other irrelevant sources.
please fact-check yourself, cite your sources, and come better prepared if you want to have an intelligent debate.
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