Abstract

The task of this study was to assess the peculiarities of oxygen desaturation in muscular tissue (StO2) and cardiovascular changes during the performance of breathing exercise combining the active hyperventilation and breathing stops. During the investigation subject underwent four of exercise cycles combining the hyperventilation and breathing stops. Changes in StO2 muscular blood flow, systemic arterial blood pressure and cardiac changes (12 lead ECG indices) were analyzed. Results obtained during the study showed that breathing stops has made an influence to various cardiovascular changes. A significant increase in heart rate and decrease of systolic and diastolic arterial blood pressure was observed during each hyperventilation. Breathing stops impact a vasoconstriction of vessels why the significant rise of diastolic and systolic blood pressure, decrease of muscular blood flow and decrease of StO2 was observed. A drastic decrease in heart rate was observed at each apnea. The delay in changes of JT interval of ECG in comparison to changes of RR intervals increased during the hyperventilation and decreased during the breathing stops. The performed four phases of exercise leads to the significant tendency of decrease in index of velocity of adaptation. It was concluded that breathing exercise impact a drastic cardiac changes and changes in peripheral blood flow, in kinetics of StO2 in muscular tissue why it can by recommended as additional factor in functional training in sports or for health improvement purposes. Verf.-Referat