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Complete implementation of pulse oximeter
Doležal, Lukáš ; Kaller, Ondřej (referee) ; Šotner, Roman (advisor)
This thesis deals with the design of a pulse oximeter. The resulting device allows to measure human blood oxygen saturation and heart rate in a non-invasive way. Easy portability is enabled by battery power supply and the used colour graphical display ensures clear display of the measured data. The paper describes in general terms the principle of pulse oximetry, a description of the chosen electronic components and the firmware developed to ensure the device's operation. Verification of correct operation was performed by comparing the measurements with similar devices available on the market.
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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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Advanced scoring of sleep data
Jagošová, Petra ; Novotná, Petra (referee) ; Ronzhina, Marina (advisor)
The master´s thesis is focused on advanced scoring of sleep data, which was performed using deep neural network. Heart rate data and the movement information were used for scoring measured using an Apple Watch smartwatch. After appropriate pre-processing, this data serves as input parameters to the designed networks. The goal of the LSTM network was to classify data into either two groups for sleep and wake or into three groups for wake, Non-REM and REM. The best results were achieved by network doing classification of sleep vs. wake using the accelerometer. The statistical evaluation of this best-designed network reached the values of sensitivity 71,06 %, specificity 57,05 %, accuracy 70,01 % and F1 score 81,42 %.
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Cardiotachometer
Máca, Kamil ; Číž, Radim (referee) ; Chmelař, Milan (advisor)
This masters thesis describes possibilities of a heart rate measuring. Several methods of measuring will be discussed. The primary objective of this paper is to design battery powered cardiotachometr with a range of 30-240 beats/min and a low battery indication. Cardiotachometer uses the R waves detector to measure heart rate. This thesis is focused on creation of the block diagram, electrical circuit, printed circuit and calculation of electronic device used in cardiotachometers.
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Heart rate measurement
Jiřík, Ondřej ; Rampl, Ivan (referee) ; Chmelař, Milan (advisor)
This work deals with the measurement of heart rate parameters. One of the objectives of this work is a summary of methods for measuring heart rate, from which data can be derived heart rate and subsequently evaluated. Also deals with the accuracy of this parameter. It describes the basic characteristics of sensors and applicable in terms of sensitivity to movement. In the work is drawn design of a simple heart rate monitor with a range of 40-200 beats per minute. For the whole device is carried out by the proposal of the printed circuit board in EAGLE program.
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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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Mobil system for monitoring of sports activity
Maleňák, Filip ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
The aim of this master’s thesis is to analyse methods that are used for monitoring athlete’s activities and a description of current technical solutions with a focus on heart rate and respiratory rate monitoring. The presented solution shows the possibilities of using available open source SW and HW technologies and their implementation in the design of an integrated tool for monitoring sports activities with the iOS operating system.
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