Figure 4: Changes in oxidative stress and antioxidant activity during submaximal-intensity exercise experiment (SEE, A and B) and seated rest experiment (SRE, C and D). Note: Blood samples were collected at rest before inhaling experimental gas and immediately after the end of each experimental trial for both the SEE and SRE. d-ROMs: diacron-reactive oxygen metabolites, an index of oxidative stress level; BAP: biological antioxidant potential, an index of antioxidant activity. Data are expressed as mean ± SE. *P < 0.05, vs. baseline.