Influence of body length on orthostatic test parameters of student-athletes

Abstract

Aim: to identify the influence of body length on the indicators of vegetative-vascular regulation of student-athletes.
 Material and methods. The study involved 42 second-year students who play sports at the amateur level (qualification level - 2-3 sports degree). The following research methods were used in the work: method of analysis of literary sources; method of determining body length; orthostatic test method; method of determining stroke volume and minute blood volume.
 Results. It was found that the increase in systolic blood pressure during the transition from horizontal to vertical position in students whose body length is above 190, significantly higher than in students whose body length does not exceed 175 cm (p <0.01) diastolic blood pressure, then in students whose body length is above 190 cm, this figure is significantly higher (p <0.01) both horizontally and vertically. The stroke volume of tall (more than 190 cm body length) students in the standing position is significantly less than that of students with a body length of 150-175 cm. There is a significant effect of body length on systolic blood pressure in the standing position, diastolic blood pressure in the supine and standing positions, heart rate in the supine and standing positions, stroke volume in the standing position, minute blood volume in the supine position and standing (p <0,001). The effect of body length on the orthostatic test was also significant for the following data: systolic blood pressure in the vertical position, diastolic blood pressure in the vertical position; change in diastolic blood pressure when changing body position from horizontal to vertical; heart rate in vertical and horizontal positions; change in heart rate during the transition from horizontal to vertical position; stroke volume of blood in the vertical position; change in stroke volume of blood during the transition from horizontal to vertical position; all indicators of minute blood volume.
 Conclusions. The state of the cardiovascular system of student-athletes is characterized by high fitness. It was found that students with a body length of more than 190 cm have difficulty with vegetative-vascular regulation.

Features of vascular regulation of students – future specialists in physical education and sports of different sports specializations with different body lengths

“…For each indicator, the arithmetic mean, standard deviation S (standard deviation), error of the mean (m) and estimation of the probability of discrepancies in the Student's t-test with the appropriate level of probability (p) were determined for groups of students involved in football, track and field, judo and for groups of students with body length above average (more than 190 cm) and average (below average) (150-175 cm). Differences and relationships were considered reliable at the significance level p <0.05 [13,14].…”

“…The magnitude of the stroke volume depends on the force of the heart contraction and the amount of blood flowing to it during diastole through the veins. Stroke volume (SV) can be calculated by Starr's formula [12][13][14].…”

“…This fact can be regarded as a more pronounced adaptive response of students with a body length above 190 cm from the cardiovascular system and vascular regulation. These adaptive responses are not sufficient, because the magnitude of the shock volume of blood and minute volume of blood flow in the vertical position in students of high body length is significantly smaller compared to students with a body length of 150-175 cm [13,14].…”

“…We [13,14] found that students with a body length of more than 190 cm have difficulty with vegetative-vascular regulation. The effect of body length on the orthostatic test was also significant for Health, sport, rehabilitation Здоров'я, спорт, реабілітація Здоровье, спорт, реабилитация 7(2) the following data: systolic blood pressure in the vertical position, diastolic blood pressure in the vertical position; change in diastolic blood pressure when changing body position from horizontal to vertical; heart rate in vertical and horizontal positions; change in heart rate during the transition from horizontal to vertical position; stroke volume of blood in the vertical position; change in stroke volume of blood during the transition from horizontal to vertical position; all indicators of minute blood volume.…”

“…It is also known [12][13][14] that in people of high body length, the change in performance during the transition from horizontal to vertical body position is more pronounced, because a larger volume of blood falls sharply to the lower extremities. This leads to the need for more pronounced adaptation mechanisms of heart rate and blood pressure.…”