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Assessment of the energy cost of florball and flag football
Máchal, Tomáš ; Bunc, Václav (advisor) ; Jandová, Soňa (referee)
The thesis elaborates the difficulty of flag football compared to floorball using heart rate measurements. Measurements for each sport were taken with six players in the age range of 18- 37 years old for twenty minutes of the game. Players are active in these sports and were selected after consultation with coaches. The measured values were processed using statistical data analysis and presented through bar graphs. Five load zones were determined for data analysis, using Polar application. The first zone of 50% to 60% of maximum heart rate and each subsequent zone covered values ranging 10% higher. The measurements showed that floorball players reached a significantly higher average heart rate during the game, 153.1 ± 9.4 bpm, compared to the average heart rate of 131 ± 6.7 bpm achieved by flag football players. The floorball players also measured a higher average maximum heart rate, which was 190.5 ± 9.4 beats/min. In flag football players, this value averaged 173.8 ± 8.5 beats/min. Furthermore, the measurements showed that the flag football players spent significantly more time in the lower load zones during the game than the floorball players. Specifically, flag football players spent 25.2% of the time in the first zone, 32.8% of the time in the second zone, 28.5% of the time in the third zone,...
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Using of neural network for detection of heart rhythm disturbances from ECG data and accelerometer signal
Aleksandrenko, Borys ; Ředina, Richard (referee) ; Bulková, Veronika (advisor)
This bachelor's thesis addresses the issue of detecting heart rhythm disorders from EKG and accelerometer signals using machine learning. First, an analysis of the possibilities for detecting heart rhythm disorders from these signals was conducted through a theoretical review. In the next part, a methodology was proposed for detecting two rhythm disorders: inappropriate sinus tachycardia and chronotropic incompetence. The methodology was further supplemented with adaptive filtering of EKG signals using signals from the accelerometer. In the third part of the thesis, a database of samples was created for training machine learning models proposed in the methodology. The next section included the description and implementation of the models. In the fifth part of the thesis, an application for detecting heart rhythm disorders using the proposed methodology was developed in the Python programming language. Finally, a discussion and evaluation of the results were conducted.
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Detection of pilot body conditions by biometric sensors
Jakubec, Jakub ; Cigánek, Jan (referee) ; Chlebek, Jiří (advisor)
This master 's thesis deals with the detection of the state of the pilot using biometric sensors. The theoretical part describes various physiological states and types of sensors used for monitoring. Studies dealing with sleep detectioin and ways to detect drowsiness and sleep are presented here. The practical section focuses on gathering data from the actual aircraft environment and analyzing it. The results of the practical part show that the technology used has great potential and pilots are open to this technology. This technology would significantly improve flight safety.
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The effect of beta-alanine supplementation on aerobic exercise in adolescent athletes
BAHENSKÝ, Petr
Supplementation is generally increasingly popular at this time, so the aim of our bachelor thesis was to explore in more detail the effect of beta-alanine supplementation on aerobic load in adolescent athletes. We looked at how beta-alanine affects the performance and endurance of young athletes during physical activity. In total, 20 young athletes participated in the study, of whom 8 were boys and 12 were girls. They underwent two staged exercise tests over a four-week period. The athletes were randomly divided into two groups: the experimental group that supplemented beta-alanine and the control group that took placebo. The results showed that after four weeks of beta-alanine supplementation, there was a significant improvement in the overall time to exhaustion. Specifically, an increase of 7.4 % was observed. The running rate at the second ventilation threshold increased by 5.7 %. An important aspect was also the blood lactate value, which increased by 8.8 % three minutes after the end of the test. This increase in lactate suggests that beta-alanine supplementation resulted in greater exhaustion, resulting in increased lactate production. Next finding was that other parameters such as VO2max, maximum heart rate and final respiratory exchange rate did not change significantly. This indicates the specificity of the effects of beta-alanine under aerobic load in adolescent athletes. In conclusion, the results of this bachelor's thesis suggest a positive effect of beta-alanine supplementation on aerobic load in young athletes. This dietary supplement can be a useful tool for improving endurance performance and achieving better sports results in this specific group.
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Influence of stress on pilot abilities
Procházková, Hana ; Chlebek, Jiří (referee) ; Šplíchal, Miroslav (advisor)
The diploma thesis focuses on measuring the pilot´s stress during real flights. The general methodology is established. This methodology should be followed when measuring stress. This methodology is applied on students and pilots during a real flight. Results show that with the gradual data collection, this methodology could contribute to the long-term goal of setting the tolerable level of stress and help streamline flight training.
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Causal interaction analysis of cardiovascular signals
Tiurina, Mariia ; Kolářová, Jana (referee) ; Svačinová, Jana (advisor)
Application of the non-invasive methods to detection of the baroreflex sensitivity is a correct way to evaluate the functions of cardiovascular system. This master’s thesis describes the theoretical informations about the problem of baroreflex sensitivity from anatomical, patalogical and clinical views. Theoretical knowledges are foundation for mathematical description of some methods to detection of baroreflx sensitivity in time, frequency and information dimensions. In the practical part of the master’s theses are presented two methods of BRS detection – sequence method based on finding the specific sequences of time series signals and method of application bivariante autoregressive model. Both of methods are implemented in MATLAB. The results of testing data on real data are discussed.
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Polygraphic measurement of stress
Faltýnková, Květoslava ; Kolář, Radim (referee) ; Bubník, Karel (advisor)
This work deals with polygraphic measurement of stress. The paper describes the physiological manifestations of stress induced as a result of false answers to the question and ways to measure these phenomena. It focuses mainly on changes in heart rate, blood pressure, respiration and skin resistance. It is designed to work in the block diagram of polygraph, described the course of measurement and evaluation. The work is also mention of lie detection using EEG.
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Evaluation of cardiac output by bioimpedance method with patients with pacemaker
Soukup, Ladislav ; Cimbálník, Jan (referee) ; Vondra, Vlastimil (advisor)
This thesis deals with the possibility of using impedance cardiography for calculating cardiac output. Kubicek’s, Sramek‘s and Sramek-Bernstein‘s methods are discussed here. These methods were applied to a data set, obtained by measuring on subjects with implanted cardiostimulators. The subjects’ heart rate was being changed by the programing of cardiostimulators. Thanks to this procedure the measured data were not affected by artifacts, connected with the heart rate change caused by a body stress, or other influences. An influence of heart rate on a cardiac output value based on the statistical processing of the data set was studied.
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Bioimpedance signal processing
Soukup, Ladislav ; Kolářová, Jana (referee) ; Provazník, Ivo (advisor)
The aim of this thesis is a study of impedance cardiography and its subsequent use in determining the cardiac output. The calculation in this work uses three default types of biological signals: the ECG signal to gallop and the impedance cardiography. There are identified the necessary parameters of the signals, especially heart rate, heart sounds (S1,S2) and the derivative impedance cardiography. This method of determining cardiac output is non-invasive and is easy to perform for doctor and patient, which is very important for risky patient especialy. Disadvantage is imprecision, that is eliminated by modifying the algorithm of the calculation. User interface for processing all the necessary signals and the subsequent calculation of cardiac output was implemented in MATLAB programming environment and is optimized for data measured and processed in the ISI ASCR.
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Analysis of pulse wave velocity variability
Benešová, Lenka ; Kozumplík, Jiří (referee) ; Svačinová, Jana (advisor)
This diploma thesis deals with the variability of pulse wave velocity. It studies the variability of cardiovascular signals. It presents the research of measurement of pulse wave velocity and its analysis in physiology and pathological physiology. Applies spectral analysis in Matlab to a data set. It evaluates and reviews the results of this analysis
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