Features of functional reserves of the cardiovascular system in cadets of the maritime university in conditions of long-term navigation

Aim: to reveal the features of cardiovascular system functional reserves in naval cadets under the conditions of a long voyage.

Materials and methods. 70 cadets undergoing training and sailing practice for 165 days on Sedov training and sailing ship were studied. Cardiovascular system reserves were determined once a month indices before taking over the watch. The results were elaborated using the SPSS program, v 17.0 (IBM).

Results and their discussion. On the first, second, and third months of the voyage, the naval cadets retained the functional reserves of the cardiovascular system, which is indicated by the typical normotonic reaction in its activity in response to physical activity.

On the fourth and fifth, the cadets showed signs of a decrease in the reserves of the cardiovascular system, which is manifested by a slower recovery after standard physical activity, a decrease in the inotropic reserve index and an increase in the chronotropic reserve index.

1. Myznikov I.L., Shcherbina F.A. Features of the formation of compensatory-adaptive reactions of the body of sailors under conditions of prolonged chronic stress. Human Physiology, 2006, Vol. 32, No. 3, рр. 92-97 (In Russ.).

2. Natelson B.N. Stress, hormones and disease // Physiol. Behav. 2004. Vol. 82, Iss. 1. Р. 139-143.

3. Larzelere M.M., Jones G.N. Stress and health // Primary Care: Clinics in Office Practice. 2008. Vol. 35, Iss. 4. Р. 839-856.

4. Bogdanov R.P., Lupachev V.V., Logvinenko N.T. Daily monitoring of blood pressure during long sea voyages. Bulletin of the Pomeranian University. Series: Natural Sciences, 2011, No. 2, pp. 41-44 (In Russ.).

5. Gudkov A.B., Nebuchennykh A.A., Popova O.N. Indices of cardiovascular system activity in military men from Russian Navy training center in conditions of European North. Human Ecology, 2008, No. 1, pp. 39-43 (In Russ.).

6. Kamalutdinov S.R., Lupachev V.V. Dynamics of the blood pressure and the electrocardiographic signs of left ventricular dilation among seamen with arterial hypertension in the long voyages. Human Ecology, 2009, No. 2, pp. 31-34 (In Russ.).

7. Gudkov A.B., Shcherbina F.A., Myznikov I.L. Adaptive reactions of the organism of seamen of the fishing fleet: monograph. Arkhangelsk: Publishing house of the Northern State Medical University, 2011, 241 p. (In Russ.).

8. Kubasov R.V., Lupachev V.V., Logvinenko A.T., Kubasova E.D. Changes in blood pressure in sailors during long sea voyages. Marine Medicine, 2016, Vol. 2, No. 3, pp. 57-60 (In Russ.).

9. Agadzhanyan N.A. Stress and adaptation theory. Monograph. Orenburg: IPK GOU OSU, 2005, 190 p. (In Russ.).

10. Aulik I.V. Determination of physical performance in the clinic and sports. 2nd ed., Rev. and additional. Moscow: Publishing house Medicine, 1990, 192 p. (In Russ.).

11. Motylyanskaya R.E., Erusalimsky L.A. Medical control in mass physical culture and health work. Moscow: Publishing house FiS, 1980, 95 p. (In Russ.).

12. Kondrakov V.M., Koledenok V.I., Arsenyeva L.I. Determination of indicators of physical performance in flight personnel and their clinical assessment. Space biology and aerospace medicine, 1983, Vol. 17, No. 1, pp. 82-84 (In Russ.).