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Acute effect of warming up on the speed of tennis serve
Gavendová, Karolína ; Jebavý, Radim (advisor) ; Kočíb, Tomáš (referee)
Abstracts Title: Acute effect of warming up on the speed of tennis serve Objectives: Compare the influence of a dynamic warm-up with tennis racquet, dynamic warm up with elastic resistance and dynamic warm-up with medicine ball on the speed of tennis serve. Methods: To fulfil the aim it was to use the radar Stalker Pro II. The obtained results after each warm-up has been processed to the average and maximum values and then compared with each other. Results: In this work, it is not possible to confirm acute positive influence of the specific dynamic warm up. In terms of average and maximum values after single warming up it was evident, that the lowest values were obtained after dynamic warm up with elastic resistance and the maximum values were achieved after dynamic warm up with medicine ball at category of kids and after dynamic warm with tennis racquet at category of adults Keywords: tennis serve, speed, warming up, dynamic stretch
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Acute effect of warming up on the speed of tennis serve
Gavendová, Karolína ; Jebavý, Radim (advisor) ; Kočíb, Tomáš (referee)
Abstracts Title: Acute effect of warming up on the speed of tennis serve Objectives: Compare the influence of a dynamic warm-up with tennis racquet, dynamic warm up with elastic resistance and dynamic warm-up with medicine ball on the speed of tennis serve. Methods: To fulfil the aim it was to use the radar Stalker Pro II. The obtained results after each warm-up has been processed to the average and maximum values and then compared with each other. Results: In this work, it is not possible to confirm acute positive influence of the specific dynamic warm up. In terms of average and maximum values after single warming up it was evident, that the lowest values were obtained after dynamic warm up with elastic resistance and the maximum values were achieved after dynamic warm up with medicine ball at category of kids and after dynamic warm with tennis racquet at category of adults Keywords: tennis serve, speed, warming up, dynamic stretch
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Analysis of the toss and impact in the tennis serve
Tyl, Slavomír ; Kočíb, Tomáš (advisor) ; Tůma, Martin (referee)
Title: Analysis of the toss and impact in the tennis serve Objectives: The objective of our work is to analyse the phase of toss and hit in tennis serve and to compare the results between the players themselves. Methods: As the main method of data collection we used kinematic 3D analysis. Additional method was semi-structured interview with selected players for research. Results: We found that more stable performance at the phase of toss and hit achieves the player with the higher position on the tennis ranking. Furthermore we found that the ball in all serves was hit in front of the players body. The largest range of variation (most unstable) in both players was width M, that means hitting ball in a frontal plane in consideration of the vertical axis Y established by left foot tip designed by the server's. Conversely the most stable in both players was height of shoulders when hit. Keywords: tennis serve, toss, hit, kinematic 3D analysis
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Economics of tennis: new empirical tests of minimax theorem
Kuncová, Barbora ; Hudík, Marek (advisor) ; Chytilová, Helena (referee)
The objective of the thesis is to test empirically the Minimax Theorem with the help of real data from tennis matches. The thesis is based on the assumption that the serve is the crucial factor of a game for a player and that it influences the length of the following exchange. Based on these assumptions a hypothesis is deduced stating that according to the minimax hypothesis, a server plays the more, the shorter the exchanges following serve are. The hypothesis is first verified by a regression analysis and then, to strengthen the validity of its results, with the help of the Pearson's chi-square goodness-of-fit test of equality of two distributions. The hypothesis is finally confirmed based on these two methods.
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