The central hemodynamics special features of sportsmen with a glance to changes in heart rate variability as the response on the training loads
Keywords:central hemodynamics, heart rate response on loads, highly qualified sportsmen
Aim: to analyze indices of the central hemodynamics of highly qualified sportsmen at rest taking into account HF-components of heart-rhythm variability after training loads.
Methods of research. To study the special features of the central hemodynamics there was used spiroarteriocardiorythmography (SACR) that allows to detect in the regimen of momentary registration indices that characterize heart activity (according to ECG data in the first lead), vessels (systolic arterial pressure (SAP) and diastolic arterial pressure DAP)) on the middle phalanx of the finger by Penaz method, respiratory system (according to an ultrasound spirometry data). Statistical analysis was carried out using nonparametric methods with determination of Mann-Whitney criterion.
Results. The study of influence of training loads in the period before competitions allowed to establish that after training load in several sportsmen were noticed the low values of HF-component of HRV(58,1%), and in other ones the values of HF-components of HRV were in the limits of population norm (38,7%). This fact indicated the differences of HRV responses in different sportsmen that further formed two groups of research ЕG1 and ЕG2.
An analysis of central hemodynamics demonstrated that in most sportsmen from ЕG1 (88,2%) and ЕG2 (64%) was noticed the hypokinetic type of blood circulation. Hyperkinetic type of blood circulation was not registered in any group. The comparison of separate indices of central hemodynamic demonstrated that final diastolic volume (FDV), final systolic volume (FSV) and momentary volume of blood (MVB) are reliably higher in experimental group (ЕG2) (р < 0,01). In ЕG1 was noticed the reliably more peripheral resistivity of vessels (PRV) (р < 0,05).
Conclusion. The study of central hemodynamics in groups of sportsmen whose response on training loads differed on the level of high-frequency component activity of the heart rate variability allowed establish that these changes are determined by the reliable differences of central hemodynamics at rest. First of all it concerns differences of SAP, FDBC, FSV, SV, MVB and PRV in sportsmen. The cited differences testify the more effective parameters of central hemodynamic in sportsmen whose response on training load is the decrease of force of heart rate variability in high-frequent diapason below265,7 ms2
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