Physiological status of «Mars-500» project participants in different seasons in the north

The comparison of physiological statuses of male northerners participating in “Mars-500” project in cold (October), transitional (April) and warm (July) periods of the year was conducted. The majority of physiological indices show great stability during different seasons. Seasonal changes (presumably caused by temperature factor) were observed in thermoregulation (skin and body temperature), blood pressure, hypoxemia tolerance indices and circulatory reactions on physical load and orthostatic test.