Relation between aerobic fitness level and stress induced alterations in neuroendocrine and immune function.

Alterations in neuroendocrine and immune function were examined in sedentary (n=15) (VO2peak; 31.4+/-0.7 ml x kg(-1) x min(-1); 24.4+/-1.2yr), moderately active (n=15) (VO2peak; 45.4+/-1.1 ml x kg(-1) x min(-1); 24.2+/-1.1 yr) and aerobically trained (n=15) (VO2peak; 58.8+/-0.9 ml x kg(-1) x min(-1); 24.3+/-1.0 yr) men following exposure to an acute mild psychological stressor. Subjects had 2 min to prepare, and 3 min to deliver a speech in front of 3 observers. Blood samples were drawn from an indwelling catheter before, during and 30 min following the speech task (ST). Self-reported measures of anxiety were obtained prior to and immediately following the stressor. The ST resulted in significant alterations in the number and function of immune cells, and in self-reported anxiety scores. Plasma levels of norepinephrine increased during the speech task. The neuroendocrine and immune response to the chosen stressor were independent of subject aerobic fitness level.

[Calculation of hemodynamic and myocardial contractility parameters as determined by noninvasive methods using the Elektronika MK 61 microcomputer]. / Raschet parametrov gemodinamiki i sokratitel'noi sposobnosti miokarda pri ispol'zovanii neinvazivnykh metodov issledovanii na mikrokal'kuliatore "Elektronika MK 61".

A specific programme elaborated for microcalculator "Electronika MK 61" can be applied by intensive care specialists to mathematical processing of the results of impedance plethysmography and phase analysis of the cardiac cycle.