Annual dynamics of functional indices in men of the North

14 residents of the Russian North (62º40'N) were examined six times during the year. Anthropometrical and cardiovascular examinations and heart rate variability measurements have been done in standard laboratory conditions at the rest and during the excersise. In addition, orthostatic, cold and Martinet’s tests have been performed. Most of the average group values did not show statistically significant differences between months and seasons. Significant inter-seasonal variations were found only in the handgrip strength, systolic blood pressure, the tympanic and skin temperature, and in the selected samples for Martinet’s, orthostatic and cold tests.