Functional indices in participants of the satellite study of the Mars-500 project in the Russian north during different seasons

We studied morphological, physiometrical, physiological, and biochemical indices in 17 adult male residents of the North involved in the satellite experiments in the framework of the Mars-500 project and calculated pre-nosological indices of health in them in different seasons using the Ecosan-2007 hardware and software complex. We found sinusoid seasonal variations in the group mean values of thermoregulation (body and skin temperature), lipid metabolism (blood contents of cholesterol and high- and low-density lipoproteins), and regulation of hemodynamics under the conditions of physical load (increase in the double product and its recovery). In most subjects studied, we revealed adverse deviations from the middle-latitude standards in all seasons in the values of body weight, force and living indices, latency of simple visual-motor response, autonomic Kérdö index, rate of physical health, and index of activity of the regulatory systems.