Catecholamine responses to environmental stressors in trained and untrained men after 3-day bed rest.

INTRODUCTION The effect of decreased physical activity with reduced gravitational stress on activity, sensitivity, and reactivity of the sympathetic nervous system (SNS) is not fully recognized. We hypothesized that the effect is most pronounced in physically active subjects. Thus, basal plasma norepinephrine [NE] and epinephrine [E], and catecholamine… CONTINUE READING