National Repository of Grey Literature 5 records found  Search took 0.01 seconds. 
Objectification and differences of strength and speed in young elite soccer players.
Procházka, Martin ; Malý, Tomáš (advisor) ; Kunzmann, Egon (referee)
Author: Martin Procházka Title: Objectification and differences of strength and speed in young elite soccer players Objective: The main aim of this bachelor thesis is to objectify and compare selected strength and speed abilities in young elite football players of the U16 category at AC Sparta Prague club. A sub-objective of this work is to compare the results within the tested group of players and provide an overall comparison of the measured data. Methods: The research sample consisted of 21 players. Laboratory testing included the diagnosis of body composition, measurement of thigh muscle strength, and testing explosive strength of the lower limbs. Field testing comprised a 5 m, 10 m, and 30 m sprint acceleration test, a 5-0-5 agility test, and a maximal 20 m linear sprint test. Results: The analysis of players showed significant disparities in the strenght of the anterior and posterior thigh muscles. Goalkeepers excelled in tests of explosive strenght in the lower limbs. In measurements of acceleration speed, forwards achieved the best times, while defenders exhibited slower results. Overall, there is a notable variability in the movement abilities of players depending on their positions on the field. Conclusion: The aim of our bachelor thesis was to objectify and compare the strength and speed...
Upper limb and trunk strength asymmetry and relationships in young elite soccer players
Haisová, Linda ; Hank, Mikuláš (advisor) ; Kunzmann, Egon (referee)
This diploma thesis aimed to evaluate the level of upper limb strength asymmetry between the dominant and non-dominant side and trunk rotation strength in young soccer players, then to compare this relationship with respect to strength performance. The research population consisted of 18 young players in the U16 age group who play soccer at an elite level. Players participated in isometric upper extremity and trunk strength testing. Data collection of isometric upper limb grip strength (Handgrip) parameters was performed using a digital handheld dynamometer (Takei, A5401, Japan). A Humac Norm Cybex isokinetic dynamometer (CSMi, Humac Norm, USA) in isometric mode was used to test trunk strength in rotation. The results of the trunk rotation force values in favor of the dominant side averaged 19.83 ± 3.47 kg. For the non-dominant side, players achieved average results of 19.17 ± 3.33 kg. The T-test results showed that the dominant side of the body achieved significantly higher results in absolute trunk rotation strength with a value of p = 0.035, also in relative strength with a value of p = 0.032. In the Handgrip, the average result value on the dominant side was found to be 41.76 ± 8.63 kg. The non-dominant side achieved a mean grip strength value of 39.68 ± 5.79 kg. The results of the T-test...
Identification, objectification and determination of performance and health-prevention criteria in elite soccer players
Kunzmann, Egon ; Malý, Tomáš (advisor) ; Kaplan, Aleš (referee) ; Zháněl, Jiří (referee)
Identification, objectification, and determination of performance criteria for elite soccer players. Aim: Identification of key point indicators (KPI) of young soccer players with a focus on objectifying and determining the possibility of achieving the highest level of performance. Methods: The study included 157 soccer players, who were then divided into five age groups (U21, U19, U18, U17 and U16) and three performance groups (Elite - 1st league players, Sub-elite - 2nd league players, Amateur - 3rd league and lower performance levels players). Within laboratory diagnostics, the following areas were evaluated: body composition (bioimpedance method), postural stability (using pressure plates), explosive power of the lower limbs (three types of vertical jumps), strength and power of knee extensors and flexors (using isokinetic dynamometry) and the value of the maximum aerobic capacity VO2max (using the pulmonary ventilation exercise test). Within the field diagnostics, the areas of acceleration time (sprint at 5 and 10 m), maximum speed (sprint at 20 m flight), time in the test of change of direction (Agility 505 test and K-test) and values of endurance ability (Yo- Yo intermittent recovery test level 1 and 2). The diagnosed data were then processed in the statistical program RStudio® (USA) using...
Seasonal variation of speed and endurance in young elite soccer players
Kunzmann, Egon ; Malý, Tomáš (advisor) ; Kokštejn, Jakub (referee)
Title: Seasonal variabilityof speed and endurance skills of young elite soccer players. Objectives: Comparison of variability in speed and endurance capabilities of young elite soccer players during one season in the U-12 category based on the results of a test battery consisting of 4 tests (30 m sprint test, Agility 505 Test, Illinois test and Yo-yo intermittent recovery test level 1). Methods: Our thesis is characterized by using comparison and testing methods. We use the comparison method in the result section, in order to compare the performance of individual players by means of statistical methods. This is how we focus on each of our test exercises during all four testing phases included in seasonal macrocycle. The results: As the result of our thesis, we found out that the physical abilities of individual players and their demonstration in the performed tests improve or remain the same or statistically very similar throughout the season. We observe the highest variability in agility 505 test with a 6.96 % DL and 7.29 % NDL as well as a 25.86 % in Yo-Yo intermittent recovery level 1. According to our observations, deviations in the performance of soccer players are mainly caused by long-term and systematic training process, different training and match load of the players during the...

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