Figure 3From: The role of oxygen-increased respirator in humans ascending to high altitude Effects of OIR on SaO2 at high altitudes of 3,700 m, 4,000 m, 4,700 m, and 5,380 m. P values were estimated using paired Student’s t-test. aP < 0.05, as compared with ’Rest without OIR’. bP < 0.05 and cP < 0.01, as compared with ’Motion without OIR’.Back to article page