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There was investigated the dynamics of the functional state of the cardiovascular system of students after bicycle exercise load, followed by cold inhalation of lavender oil. Examinations were performed in the first half of the day at the same time, three times: 1) before exercise load (the state ofphysiological norm); 2) immediately after the load for 15minutes on the bike training apparatus «Proteus Pec 3320» in the third position, followed by aromatherapy; 3) at the 15 minute of the post-exercise load recovery period. Aromacorrection was executed by the method of cold inhalation. Registration and analysis of ECG by variation pulsometry was implemented by hardware-software complex, which combined the portable electrocardiograph of brand “Bio-Arm 001”, a personal computer and software for automatic recording and analysis of ECG with the method of variation pulsometry according to parameters of the cardiac rhythm. In the absence of correction factors (control group) the work on a stationary bike was established to be accompanied by significant deviations of all investigated parameters of the heart rhythm, the majority of which persisted at the 15 minute of the post-exercise load period also. Inhalation with the essential lavender oil (control group) under the bicycle load has a sedative effect on the activity of regulatory mechanisms of heart rhythm students. Releasing of the increased sympathetic influence on heart rate, initiated by the physical activity, it facilitates the rapid recovery of the functional state of the body in the post-exercise load period, thereby promoting its tolerance to effects of stress factors.

The influence of examination-induced psycho-emotional stress on students' hemodynamic parameters, nitric oxide (NO) level and electrolyte composition of saliva was investigated. Before examinations, the examinees with a sympathotonic response (75.0%) showed the increase of heart rate levels and blood pressure indices, the decline of salivary NO excretion that was retained within 24-hours after an exam. There was a significant negative correlation between the amount of NO and the values of blood pressure. The examinees with a parasympathetic response (25%) showed the elevated salivary NO level and lowered blood pressure indices in the pre- and post- examinational periods. Throughout the examination period the increased autonomic tone of the organism contributes to the changes of the electrolyte composition of saliva. In pre-examination period the examinees with sympathotonic response demonstrated a significant decrease of the concentration of Na+ in saliva, that persisted after exams also. Hyponatremia was associated with the increased K+ and decreased Na+/K+ ratio. Before exams the level of Na+ in the saliva of the students of the II group increased, at the same time concentration of K+ decreased. After the exam there was a reduction of Na+, which, however, did not reach the initial level.

There were investigated changes in the peripheral blood of rabbits under prolonged exposure to vibration (5, 10, 20, 30 days). In a separate series of experiments, the nature of changes in the peripheral blood was investigated under the combined action of vibration and stevia leaves. Contained in stevia biologically active substances were found to accelerate metabolism in bone marrow stem cells, promote the compensatory ability of the organism, thereby providing the resistance of the body to the vibration factor.