Study on dynamical characteristics of electrocardiographic parameters during physical load

The analysis of electrocardiographic parameters concatenations can be used to describe physiological changes in the whole body during physical load. Research aim was to analyse dynamical characteristics of electrocardiographic parameters in different physical ability men group during bicycle ergometry. The research contingent consisted of 63 healthy men, who according to the power achieved at the anaerobic threshold were divided into 2 groups. The following tests were used: anthropometric measurements, electrocardiography, bicycle ergometry, spiroergometry and mathematical statistics. During bicycle ergometry the pulmonary gas exchange rates were collected, which was used to establish the anaerobic threshold. This research has shown changes in the functional parameters of the cardiovascular system and inter-parametric concatenations of different fractal levels between aerobic and anaerobic work. This study established that the best results were obtained in the high aerobic power group. This research established that the functional parameters of the cardiovascular system depended on physical ability of the subjects. In the high aerobic power group, the body metabolism and regulatory systems (JT/QRS) and heart and body (RR/QRS) interaction was weaker, and the heart metabolism and regulatory systems (RR/JT) interaction was stronger than in other research group (p< 0.05) during physical load

Change of men's cardiovascular and respiratory systems functional indices at the anaerobic threshold

In the dissertation work it was synchronically registered indices of cardiovascular and respiratory systems during leveled increasing load of the bicycle ergometry test. Analysis of the changes of these parameters has allowed us to evaluate major human body systems synergistic signs and extend the functional diagnostic possibilities. Observations, measurements and evaluations are summarized in accordance with the terms of the functional body’s integrity. It is relevant for the rehabilitation specialists, sports scientists and physiologists, coaches in order to select individual physical activity and to achieve the best results without the harm to the health. In our work it was found that the anaerobic threshold can be easily determinate by analyzing the changes of concatenations during the bicycle ergometry test. The proposed method is simple and informative compared to the known and used methods up to now, that often causes discomfort to subjects (wearing masks or blood sampling). We recommend that the weak physical performance individuals should do aerobic exercises up to the anaerobic threshold, the individuals with higher physical performance – at the anaerobic threshold. Further increased exercise intensity would exceed the functional capabilities and could be harmful to health

The characterization of the transit through the anaerobic threshold based on relationships between RR and QRS cardiac intervals

This paper aims to develop a novel computational technique for the detection of the transit through the anaerobic threshold. This technique uses only cardiac intervals derived from the electrocardiogram and is based on algebraic relationships between RR and QRS intervals. Electrocardiograms are measured during the load and the recovery processes. Algebraic relationships between cardiac intervals are used not only to identify the anaerobic threshold but also to characterise individual features of the person during the transit through the threshold. The ratio between carbon dioxide and oxygen in the exhaled air is used to validate the results. The algebraic relationship between cardiac intervals serves as a stand-alone indicator for both the determination of the anaerobic threshold and the characterization of the performance of the person during the load and the recovery processes