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Changes in arterial oxygen saturation from normoxia to acute hypoxia (hypoxia group; black line, n=8), or sham hypoxia (control group; gray line; n=8) during the 15 breathing sessions.
Notes: Data are averages of the 3 to 5 hypoxic/sham hypoxic periods within each breathing session. Values are means ± standard deviation.
Abbreviation: FiO2, inspired fraction of oxygen.
