Fig. 3.

Plasma norepinephrine ([norepinephrine]) and epinephrine ([epinephrine]) concentration at rest and during moderate- and heavy-intensity exercise in the placebo (n = 8) and $\text{N}{\text{O}}_3^{-}$ (n = 8) conditions. Values are means ± SD. A main effect of exercise intensity was observed. P < 0.05, significant post hoc test difference from rest (*) and significant post hoc test difference from moderate-intensity exercise (#).