The oxygen idea is pretty bad. See https://en.wikipedia.org/wiki/Oxygen_toxicity
The oxygen thing works the other way around hypoxic environments increase metabolic rate for a small number of days. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4091035/
The oxygen idea is pretty bad. See https://en.wikipedia.org/wiki/Oxygen_toxicity
The oxygen thing works the other way around hypoxic environments increase metabolic rate for a small number of days. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4091035/