After—before concentration ratios of the investigated catecholamines, vasoconstrictor peptides and cortisol normalized with the maximal oxygen uptake.

<p>Significant differences (<i>p</i> < 0.05 and <i>p</i> < 0.01) are indicated with one or two asterisk(s), respectively; See text for exact <i>p</i> values.</p

Differences in the mean (± standard error, SE) (a) and individual concentration of catecholamines (b), vasoconstrictor peptides (c) and cortisol (d) between after and before test for the volunteers normalized with the basal concentration level of each corresponding neuroendocrine hormone and vasoconstrictor peptide.

<p>Significant differences (<i>p</i> < 0.05 and <i>p</i> < 0.01) are indicated with one or two asterisk(s), respectively; See text for exact <i>p</i> values. Arabic numbers in Fig 1b–1d represent the volunteer identification code in the given group for which the difference in at least three hormone concentration levels after and before test was higher than the mean of the hormonal concentration difference.</p