UDC

612.1:612.825.4:612.766.1

Authors

Sarychev Aleksandr Sergeevich
Northern State Medical University (Arkhangelsk, Russia)

Abstract

The paper presents the results of a dynamic cohort study aimed to assess the reserve capacity of the system regulating blood circulation in shift workers (n=76) using active orthostatic test. It is known that during the orthostatic test, gravity loads directly affect the mechanisms regulating blood circulation and, depending on the individual functional reserves, may involve various levels of the control system into the regulatory process. Shift workers with the expeditionary work-rest schedule showed two clear peaks of maximum load on their functional systems during fatigue development. The first peak was observed upon arrival and upon starting to work. Then a rapid increase in the number of workers belonging to this category was recorded in the second half of the shift work period (after 30–35 days); first of all, these were the workers that experienced chronic fatigue by the middle of the work period. When it comes to the expeditionary and rotational work-rest schedule, only 3.6 % of workers developed fatigue. Low adaptive capacity provokes changes in systolic pressure, accompanied by the growing predominance of the sympathetic division. This knowledge can be used when recruiting shift workers.

Keywords

Polar region, shift work, assessment of functional reserves, variational cardiointervalography, system regulating blood circulation

References

1. Agadzhanyan N.A., Ermakova N.V. Ekologicheskiy portret cheloveka na Severe [Ecological Portrait of the Human in the North]. Moscow, 1997. 208 p. 
2. Gudkov A.B., Tedder Yu.R. Kharakter metabolicheskikh izmeneniy u rabochikh pri ekspeditsionno-vakhtovom rezhime truda v Zapolyar’e [The Nature of Metabolic Changes in Rotational Workers in the Arctic]. Fiziologiya cheloveka, 1999, no. 3, pp. 138−142. 
3. Sarychev A.S., Gudkov A.B., Popova O.N. Kompensatorno-prisposobitel’nye reaktsii vneshnego dykhaniya u neftyanikov v dinamike ekspeditsionnogo rezhima truda v Zapolyar’e [Compensatory-Adaptive Reactions of External Respiration in Oil Industry Workers in Dynamics of Field Work Regime in Polar Region]. Ekologiya cheloveka, 2011, no. 3, pp. 7–13. 
4. Meerson F.Z., Pshennikova M.G. Adaptatsiya k stressornym situatsiyam i fizicheskim nagruzkam [Adaptation to Stressful Situations and Physical Loads]. Moscow, 1988. 256 p. 
5. Parin V.V. Primenenie kolichestvennykh metodov v meditsine i fiziologii [The Use of Quantitative Methods in Medicine and Physiology]. Matematicheskie metody analiza serdechnogo ritma [Mathematical Methods of Heart Rate Analysis]. Moscow, 1966, pp. 3–8. 
6. Parin V.V. Serdtse i fizicheskiy trud [The Heart and Physical Work]. Izbr. tr. T. 1: Krovoobrashchenie v norme i patologii [Selected Works. Vol. 1: Blood Circulation in Health and Disease]. Moscow, 1974, pp. 19−29. 
7. Baevskiy R.M. Problema otsenki i prognozirovaniya funktsional’nogo sostoyaniya organizma i ee razvitie v kosmicheskoy meditsine [The Issue of Estimating and Forecasting the Body’s Functional State and Its Development in Space Medicine]. Uspekhi fiziologicheskikh nauk, 2006, vol. 37, no. 3, pp. 42−57. 
8. Vegetativnaya regulyatsiya gemodinamiki pri ortostaticheskom vozdeystvii u zdorovykh i bol’nykh pozhilogo vozrasta s IBS [Vegetative Regulation of Hemodynamics at Orthostatic Impact in Healthy and Elderly Patients with Coronary Heart Disease]. Ukrainskiy kardіologicheskiy zhurnal, 2004, no. 5, pp. 21−25. 
9. Metody issledovaniya v fiziologii voennogo truda [Research Methods Within Military Work Physiology]. Ed. by Novikova V.S. Moscow, 1993. 231 p. 
10. Sarychev A.S. Kharakteristika adaptivnykh reaktsiy organizma vakhtovykh rabochikh v usloviyakh Zapolyar’ya: avtoref. dis. … d-ra med. nauk [Characteristics of Adaptive Reactions of the Shift Workers’ Bodies in the Arctic: Dr. Med. Sci. Diss. Abs.]. Arkhangelsk, 2011. 34 p. 
11. Fateeva N.M., Kolpakov V.V. Kompensatsiya fiziologicheskikh funktsiy pri chelnochnykh meridional’nykh pereletakh (srednie shiroty – Zapolyar’e) [Compensation of Physiological Functions During Meridional Shuttle Flights (Mid-Latitudes – Polar Region)]. Tez. dokl. V Sibir. fiziolog. s”ezda [Outline Reports of the 5th Siberian Congress on Physiology]. Tomsk, 2005, p. 132. 
12. Variabel’nost’ serdechnogo ritma. Standarty izmereniya, fiziologicheskoy interpretatsii i klinicheskogo ispol’zovaniya [Heart Rate Variability. Measurement Standards, Physiological Interpretation, and Clinical Use]. St. Petersburg, 2000. 66 p. 
13. Aktual’nye problemy fiziologii voennogo truda [Topical Issues of Military Work Physiology]. Ed. by Shostak V.I. St. Petersburg, 1992. 238 p. 
14. Glantz S. Primer of Biostatistics. The McGraw-Hill Companies, Inc. 1997 (Russ. ed.: Glants S. Medikobiologicheskaya statistika. Moscow, 1998. 459 p.). 
15. Krivoshchekov S.G., Okhotnikov S.V. Proizvodstvennye migratsii i zdorov’e cheloveka na Severe [Work- Related Migration and Human Health in the North]. Novosibirsk, 2000. 118 p. 
16. Matyukhin V.A., Krivoshchekov S.G., Demin D.V. Fiziologiya peremeshcheniy cheloveka i vakhtovyy trud [Physiology of Human Relocation and Shift Work]. Novosibirsk, 1986. 200 p. 
17. Sarychev A.S. Kriterii otsenki rabotosposobnosti u vakhtovikov v Zapolyar’e [Evaluation Criteria for Working Capacity of Shift Workers in the Polar Region]. Vestnik Severnogo (Arkticheskogo) federal’nogo universiteta. Ser.: Mediko-biologicheskie nauki, 2013, no. 2, pp. 55–63. 
18. Ismagilov M.F. Vegetativnye sdvigi normal’nogo i patologicheskogo pubertatnogo perioda [Vegetative Changes at Normal and Pathological Puberty]. Pediatriya, 1986, no. 9, p. 76.