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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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Physiological response to adventure activity
Řezník, Ondřej ; Psohlavec, Lukáš (advisor) ; Baláš, Jiří (referee)
Objectives: The aim of this study was to investigate the effect of height on the physiological response of the body and walking speed during challenge activity. Methods: The study included 27 subjects, with an average age of 23±2, who were students of the Faculty of Physical Education and Sport (FTVS) at Charles University. The participants walked for 4 minutes over a low obstacle and 4 minutes over a high obstacle at their own pace, followed by 4 minutes over a low obstacle at a specified speed. The monitored parameters were heart rate (HR) and speed (V). Results: The average HR during walking over a low obstacle at the specified speed was 100 beats per minute (σ=12.335), and the average speed was 0.272 (σ=0.221). During walking over a high obstacle, the HR was 133 beats per minute (σ=16.125). During walking over a low obstacle at their own pace, the average HR was 111 beats per minute (σ=13.416), and the average speed was 0.706 (σ=0.269). Conclusion: Walking at height reflects the subjectively perceived risk through physiological responses. The height of the obstacle, which induces a subjectively perceived risk, increases the heart rate by 33 %. The walking speed decreased by an average of 0.434 m/s on the high obstacle. Kewords: adventure education, risk, heart rate, stress.
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Analysis of the impact of a 10-day training camp at a higher altitude on performance of adolescent runners
NOVÁK, Daniel
Goal of this Bachelor thesis is to check, if there will be any changes of functional and biochemical parameters of the organism for medium and long length track adolescent runners during a 10-day training camp in high altitude around 1850 meters. Runners were subjected to functional laboratory examination both before and after the camp. All requisites were identical for both the control group and the runners who completed this camp. We were examining measured parameters of VO2max, resting heart rate, breath capacity, expiratory minute ventilation, pulse oxygen, respiratory rate, respiratory exchange ratio, heart rate during peak oxygen consumption and maximum watt performance. Most significant watched parameter was VO2max, where we saw an increase of 15,52 % from original 55,40 +- 7,73 ml-min-1-kg-1 to 64,00 +- 9,87 ml-min-1-kg-1 . Another one was resting heart rate, there was a decrease of 5,86 % for the runners after coming back to lowland compared to rates that were measured before the camp. Erythrocytes values increased by 2,38 %, haemoglobin by 2,69 % and haematocrit by 2,27 %. All these results show factual and statistical importance, the only parameter that didn't show any statistical importance was haematocrit. Result of our research confirmed, that 10-day training camp has a major impact on functional and biochemical parameters of the organism.
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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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