Raumenu elektrostimuliacijos itaka begiku periferinei ir sisteminei kraujotakai po lokalaus dinaminio darbo
Englischer übersetzter Titel: | The influence of electric stimulation on the runners' peripheral and systemic blood flow after local dynamic work |
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Autor: | Grunovas, Albinas; Silinskas, Viktoras |
Erschienen in: | Sporto mokslas |
Veröffentlicht: | 2005, 1=39, S. 13-18, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Litauisch |
ISSN: | 1392-1401, 2424-3949 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU200711003290 |
Quelle: | BISp |
Abstract
There has not been any research on the influence of the threshold skeletal muscle electrical stimulation on peripheral and systemic blood flow intensity after local dynamic loads. The aim of this study is to assess the influence of the additional recovery means (ES) on peripheral and systemic blood flow after local dynamic exercise up to inability. Research methods: Sixteen middle and long distance runners took part in our research. Two research works were performed applying different means of recovery (passive rest and ES). The investigated people were divided into two groups (a, b) where recovery means were applied in a certain order (a – passive rest, b – 10 min ES, another day, b – passive rest, 1 – 10 min ES). During every research, two physical loads with a 20 minutes interval were performed. In every research, after 20 minutes adaptation period in sitting position and after the first and the second dynamics exercise were measured the changes of calf muscles and systemic blood flow changes. Having recorded the first dynamic exercise and blood flow, extra means of recovery were applied. Using the method of dynamometry, the maximum strength of bending muscles of foot was measured and local dynamic exercise was performed up to inability (resistance – 75 % of maximum voluntary strength). Electrical stimulation was performed with the help of an apparatus, the impulse frequency of which was 20-100 Hz. Duration of stimulation and rest became 1:1 (2 s – 2 s). Research results: The working capacity of muscles decreased 8.91 ± 3.2 % (p < 0,05). In the experimental group extra recovery means (ES) were applied. After that, the working capacity of calf muscles decreased slightly during the second physical loads – 5.73 ± 6.89 % (p > 0.05). Additional measurements of recovering (ES) had a positive influence on the working capacity of tibia muscles. The control group people’s blood flow intensity was higher 0.22 ± 0.26 ml/min/100 ml before the second exercise, while in the experimental group after ES it was analogical, the same as before the first physical exercise. After 15 minutes of passive rest, the stroke volume was much lower (p < 0.05) if compared with the initial level, as hydrostatic pressure increases in a sitting position, and blood flow accumulates in legs, but that worsens the return of blood to the heart. After extra means (10 min ES), the stroke volume reached its initial level. Conclusions: ES as an additional recovery means was applied after local dynamic exercise. It increases the velocity of the recovery process: the capacity of muscles also recovers faster. The cardiac output increased due to the stroke volume and heart rate changes. The ES improved the blood flow to the heart, therefore the stroke volume after the physical exercise returned to the initial level. Verf.-Referat