ABSTRACT
There were three medical examinations (in March, June and October) of oilers on shift days 5-6 in a field medical post in the Polar region. The survey protocol included analysis of morning (before breakfast) biochemical and cell indices, physiological examination, testing reactions to standard stimuli (color, tone), psychological testing, assessment of factual nutrition, analysis of the cardiorespiratory function at rest and during physical tests. It was stated that recovery of physical performance varied with the seasons. In March, the shift workers were significantly less reactive to the color stimulus. At low ambient temperature (-38 degrees C) blood content of alpha 1- and alpha 2-globulins went up, and there were atypical proteins and considerable amounts of total cholesterol, pre-beta-lipoproteins and alpha-lipoproteins in blood.
