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Development of improvement in muscle strength, coordination and speed in sport climbing in children of elementary school age
Pfeiferová, Zuzana ; Nováková, Tereza (advisor) ; Vomáčková, Helena (referee)
Title: Development of improvement in muscle strength, coordination and speed in sport climbing in children of elementary school age Objectives: The aim of this diploma theses is to investigate whether there will be an improvement of muscle strength, coordination and speed in children of elementary school age who attend club of sport climbing and compare results with control group. Another aim of this study is to indicate the relationship between the examined parameters. Methods: This is a quantitative study - quasi-experiment in which 28 probands aged 7-11 years participated. They were deliberately selected and divided into two groups (climbers, non-climbers). Coordination measurements were performed using eight special tests, measurements of muscle strength were performed using three climbing tests and speed was measured by time of climbing on one route. The measurements were performed two with an interval of 3 months - in October 2019 and in January 2020. Results: A statistically significant improvement (p <0.001) was noted in coordination, specifically in rhythmic ability. Other improvements, which, however, no longer reached the level of statistical significance, was recorded in coordination in tests for differentiation ability, orientation ability, ability to rebuild; also in tests for muscle...
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Use of Crossfit in condition training of junior ice hockey players
Drda, Jakub ; Bunc, Václav (advisor) ; Kaplan, Aleš (referee)
Title: Use of Crossfit in condition training of junior ice hockey players Objectives: Main idea of this thesis was to prove, that Crossfit is usefull in ice hockey while pre-season. We aimed to proved crossfit improvment at generally condition presupposition, compare to other training method. Main area of condition were speed and power presupposition. Methods: In our thesis we used a method of analysis and a method of comparison. We apllied the method of analysis in pre-season of ice hockey and the method of comparison in comparing the two different types of training method. We used Crossfit as training method, which was applied on junior hockey. Strength training based on Crossfit exercise is going to be compared with running training, This running training program is use for training of junior hockey players. In the period under consideration of the performance stage we assess the change of power and speed performances of the ice hockey players. To assassmnet we used battery of test which is identify for Czech junior hockey league. We applied this test on junior players at age 17-20, which are playing 2. Czech league. Results: This thesis proved that Crossfit can be used in pre-season training oj junior hockey. At the same time proved that explosive power assumption on players which used Crossfit...
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Experimental study of artificial articular cartilage friction
Kulíšek, Vlastimil ; Ranuša, Matúš (referee) ; Rebenda, David (advisor)
Many conventional materials are used to replace damaged articular cartilage, which are beginning to be replaced by innovative biomimetic materials that mimic cartilage properties. One of these materials are poly(vinyl alcohol) (PVA) hydrogels crosslinked by freeze-thawing and cast-drying method. These hydrogels possess similar mechanical as articular cartilage. In order to clarify the effect of kinematic conditions on the friction of hydrogels, three levels of sliding speed and load and a uniform lubricant – PBS were chosen. The coefficient of friction of the FT hydrogel decreased with increasing load. The dependence of the sliding speed did not show a uniform trend and corresponded to the adsorption-repellent model for PVA gels. The coefficient of friction of the CD hydrogel increased with increasing sliding speed according to the repulsion-adsorption model for PVA gels. The increase in load at low sliding speeds of CD hydrogel caused a slight decrease in the coefficient of friction. At the highest speed, there was an optimal load at which a low coefficient of friction was achieved. The CD hydrogel showed a lower coefficient of friction than cartilage. The FT hydrogel achieved a lower coefficient of friction than cartilage only at 5 N and 10 mm s- 1. This work contributes to the understanding of the tribological properties of PVA hydrogels.
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Brake mean effective pressure of an internal-combustion engine for passengers cars and motorcycles
Vopršal, Oldřich ; Svída, David (referee) ; Drápal, Lubomír (advisor)
The aim of this work is to discuss the meaning, definition and mapping of the characteristics of the value of the mean effective pressure depending on the historical development of internal combustion engines of automobiles and motorcycles from the initial concepts to the current development. In this work I want to compare and evaluate the values of the mean effective pressure for non-supercharged and supercharged piston combustion cars and motorcycles. Part of the work will be a graphical representation of the values of mean effective pressures and subsequent analysis and evaluation of the values against the design concept of the internal combustion engine in the historical period. Furthermore, a description of the structural elements that contribute to the increase of the mean effective pressure.
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ABS Impact to Behavior of Vehicle
Zich, Jakub ; Šimek, Václav (referee) ; Strnadel, Josef (advisor)
The bachelor thesis discusses the Anti-lock braking system and its impact on braking distance of a vehicle. The thesis contains research of this problem, a summary of suitable modeling tools, solution draft, its implementation in the UPPAAL modeling tool and tests performed with the model. The tests examine the course of progression of basic quantities associated with braking (velocity, braking distance, slip, angular velocity, friction coefficient) in simulations of emergency braking with and without the use of ABS, and compare the results. They also verify probability of the vehicle stopping in different circumstances on given distance. Lastly, the model can simulate brake or sensor defect, and results of those simulations can be compared to simulations without defect.
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Perception of vehicle speed by pedestrian
Rak, Martin ; Semela, Marek (referee) ; Bilík, Martin (advisor)
This master’s thesis deals with the issue of the perception of speed of a vehicle from pedestrian’s point of view. The theoretical part consists of a research into sense perception of humans and construction of motor vehicles. The practical part designs and describes the experiment which was performed in order to provide data used for analyzing different factors and their effect on the accuracy of vehicle speed estimations.
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Speed Abilities of Athletes 10 - 14 year old
Vodička, Tomáš ; Vindušková, Jitka (advisor) ; Kaplan, Aleš (referee)
Title: Speed abilities of 10 - 14 year old athletes Aims: The aim of the work is to assess the speed abilities of selected children from athletics categories U12 and U14. We are mainly interested in the percentage improvement of the monitored group of athletes as a whole, individual categories and individual athletes. We also determine the size of the relation of individual outputs (correlation). Methods: We uses the method of analysis and comparison to obtain the results. The tests were selected and adapted to test the speed and strength abilities of the athletes. For our purposes, we chose 3 tests (50m PVS, long jump from the place, optojump SQJ and CMJ). Each athlete participated in at least 5 testing during 1.6 - 1.7 years. Results: Most athletes improved their performance during the testing period. We found the tightness of the relation between individual test performances and somatic values. The tightness of the relation between the performance in the 50m PVS test and the long jump from the site was found to be tight with the tightness of the relation between the performances in the 50m PVS test and the performances in the SQJ / CMJ optojump tests. For testing speed-strength performances for categories up to 14 years is suffice 50m PVS test and a long jump from the spot. The SQJ and CMJ...
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Development of speed-coordination abilities in football
Machka, Miloslav ; Pokorný, Ladislav (advisor) ; Pádivý, Martin (referee)
A diploma thesis focused on speed coordination of football players in the U13 and U14 categories in FK Meteor Prague VIII. In this work we monitor speed and coordination abilities. The theoretical part is devoted to literature focused on football rules, coordination skills, speed skills, didactic forms in football and health-compensatory exercises. In the practical part the measurements from pre-test and post-test are determined. Of the two attempts, the better one was chosen. The values from the 1st and 2nd measurements are evaluated. A set of tests are chosen for testing, in which the test set contains six tests and the measurements are repeated after 6 months. A Diploma thesis from the verification of success of skills in categories U13 and U14. Focussed on observation, coaching and speed testing and coordination capabilities in two categories. The compilation of children's exercises in the pupil category.
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Comparison of level of motoric abilities of children in the period prepubescence with and without sports specialization
Štechmüller, David ; Kregl, Jan (advisor) ; Šťastný, Petr (referee)
Title of bachelor thesis: Comparison of level of motoric abilities of children in the period prepubescence with and without sports specialization Author: David Štechmüller Supervisior: Mgr. Jan Krégl Aim: The aim of bachelor thesis is to determine the average improvement and total performance of the testing group of ice hockey players in comparison with children from two selected primary schools in the test battery unifittest (6-60) during two testing periods. Methods: Comparison of both groups and their subsequent assessment on average. The research method of this bachelor thesis was used observing - measuring. Testig took place with children born in 2011/2012 (U6-U7). The unifittest battery (6-60) was selected to measure performances. Results: In this thesis was detected that nobody from the group of ice hockey players got to below-average values and lower in any test battery discipline. The overwhelming majority (94%) got to more than average values of testing in the final testing. By way of contrast, children from primary schools didn't achieve such an improvement and their performances had mostly average values all the time of measuring. Keywords: Unifittest, motoric abilities, speed, skilfulness, endurence, power, younger school age, prepubescence
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Use of Crossfit in condition preparation in junior Ice Hockey players
Drda, Jakub ; Bunc, Václav (advisor) ; Kaplan, Aleš (referee)
Title: Use of Crossfit in junior ice hockey pre-season training Objectives: Main idea of this thesis was to prove, that Crossfit is usefull in ice hockey while pre-season. We aimed to proved crossfit improvment at generally condition presupposition, compare to other training method. Main area of condition were speed and power presupposition. Methods: In our thesis we used a method of analysis and a method of comparison. We apllied the method of analysis in pre-season of ice hockey and the method of comparison in comparing the two different types of training method. We used Crossfit as training method, which was applied on junior hockey team in second junior hockey league in Czech Republic. In the period under consideration of the performance stage we assess the change of power and speed performances of the ice hockey players. To assassmnet we used battery of test which is identify for Czech junior hockey league. Most improvement was observed in power presupposition on lower body. Results: This thesis proved that Crossfit can be used in pre-season training oj junior hockey. At the same time proved that explosive power assumption on players which used Crossfit like training method. Largest effect of progression were at explosive power presupposition. This result was in skater jumps. Keywords:...
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