Table 3: NO₂^- and O₂^- Concentrations During the Exercise Test

Load		NO2- nmol/ml X ± SD	O2- nmol/ml X ± SD
0	Rest	5.36 ± 1.25	4.01 ± 0.69
I	Stage I	5.69 ± 1.32	4.18 ± 0.77
II	Stage II	4.21 ± 0.42	4.12 ± 0.65
III	Stage III	4.38 ± 0.51	4.14 ± 0.72
IV	Stage IV	3.97 ± 0.31	3.99 ± 0.64
V	Stage V	3.98 ± 0.38	4.24 ± 0.85
R1	Recovery I	3.98 ± 0.33	4.39 ± 0.92
R2	Recovery II	4.03 ± 0.49	3.93 ± 0.72