Background: An automatic massage produces health improving effects. After a single automatic massage, patients admit a feeling of invigoration, and a sense of relaxation. Some quantitative characteristics of physical effects produced by the automatic massage on the body, including the work of a heart were unavailable at that moment. Objective: This study aims to find a quantitative impact of periodic low frequency mechanical vibrations on the relative change in a heart stroke volume. Material and Methods: In this experimental study, the patients were exposed to the low frequency (12 Hz) planar mechanical vibrations. The blood pressures were measured before and after the automatic massage. Based on the measured values in the arterial blood pressure, a relative change in a stroke volume (SV) in patients was calculated. Results: The increased systolic blood pressure was 6.3±2.0 mm Hg in women and 11.1±2.7 mm Hg in men. The increased diastolic pressure was 1.9±1.2 mm Hg in women, and 4.9±1.5 mm Hg in men. The minor increase in heart rate for women was 1.2±1.0 beats per minute, and 1.2±2.0 beats per minute for men. The assessment of stroke volume changes provided 9.6% and 7.1% increase during systole and diastole in male patients, respectively, and corresponding 6.7% and 4.7% increases for female patients. Conclusion: The results of our work confirmed an increase in the systolic and diastolic blood pressures under the influence of periodic mechanical vibration of low frequency. We believe that the registered increase in blood pressure is a proof of the increase in a stroke volume (SV).

Analysis of the results of a study conducted on 129 fi rst and second year students of higher educational institutions in Chernivtsi, aged 16 to 21, who were divided into the main – 89 (69%) and the control group – 40 (31%), by determining the excursion of the chest (the diff erence between the circumference at maximum inspiration and maximum expiration, where the high is 10.0 or more, the average is 5.0-9.9, the low is 4.9 and less than 10), in order to study and analyze the indicators of the excursion for further use in sports selection, showed that the students of the main group had a signifi cantly larger number with a high level of excursions – 30 (33.7%), in contrast to students of the control group, where students with a high level of mobility had only – 5 (12.5%). And vice versa, among the students of the main group, a low level of excursion was noted in a small number – 6 (6.7%), while in the control group this indicator was – 8 (20%) of the studied. Also, when analyzing the results of the study of chest mobility indicators among students of the main group, it was noted that the highest level of excursions studied were the largest among football and volleyball players, somewhat less tennis, fi tness, basketball and free wrestling players.So, the results of the breast excursion can be taken into account in the professional sports perspective of students, specialties related to physical culture and sports, sports schools and more. And also especially to consider when referring an athlete to a specifi c sport.

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