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Participants were randomly assigned to receive high oxygen (hyperoxia) or a lower amount of oxygen intended to maintain normal blood oxygen levels (normoxia).

It’s worth noting that normal blood oxygen levels are considered 95% and higher.

Participants were randomly assigned to receive high oxygen (hyperoxia) or a lower amount of oxygen intended to maintain normal blood oxygen levels (normoxia).

Participants were randomly assigned to receive high oxygen (hyperoxia) or a lower amount of oxygen intended to maintain normal blood oxygen levels (normoxia).

Normal blood oxygen levels are considered 95% and higher. And while a person’s heart rate usually drops during sleep, the researchers found that—especially for the group drinking alcohol—the ...