Vpliv 8-tedenske vzdrzljivostne vadbe na kvalitativne in kvantitativne parametre utripnega volumna

Background: Dynamics of stroke volume during increasing progressive load varies widely among individuals. The data of current studies describing the impact of long-term endurance training on the dynamics of cardiac stroke volume are conicting. The purpose of this study was to evaluate the impact of 8-week endurance training on the dynamics of stroke volume and some quantitative features of cardiac function in recreational female runners. Methods: Measurements were performed in the physiological laboratory at the Institute of Sport, Faculty of Sport in Ljubljana. Cosmed-K4b2 equipment that allows continuous online, breath-by-breath monitoring of oxygen consumption and gases in exhaled air was used. Cardiac output was calculated by the method described by Stringer et al. Results: The results showed a signicant increase in stroke volume at rest and during the rst two minutes of the test. Maximum stroke volume did not increase, but there was a decrease in heart rate during maximal stroke volume from 126.65 ( 27.14) to 120.15 ( 26.56) beats per minute. The dynamics of stroke volume in a majority of participants did not change. The most common dynamics of stroke volume before and aer test was plateau dynamics. The training resulted in an increase in running endurance and the average increase in running speed during the nal test by 4.41 % ( 4.62). Conclusion: The exercise resulted in minimal changes in cardiac function and a signicant improvement in endurance parameters.