[Physiological aspects of optimization of expedition and work shift schedules in Arctic Regions].

A complex dynamic study covered functional state and capacity for work of crews at oil-drilling rigs in alternate and expedition-alternate conditions in Circumpolar regions of European Russia (the formula of work and rest: 12 x 12/15 + 15). The 15-day period of work was assessed in various seasons. Functional state of the workers was studied by six expeditions (in spring, summer, autumn and 3 in winter). Use of expedition-alternate schedule is less indicated since it leads to great overload of human functional resources and work capacity. If no alternative for expedition-alternate schedule, it should include rational conditions of work and rest for every activity and take into account season and distance from the resident place.