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The impact of fatigue on the kick accuracy of young soccer players
Ižovská, Jana ; Malý, Tomáš (advisor) ; Zahálka, František (referee)
Title: The impact of fatigue on the kick accuracy of young soccer players Objectives: Identify the relationship of fatigue and the kick accuracy of young soccer players. Methods: The study group consists of 20 players in the age between 17 and 22, who are actually operating on league level in the reserve of elite soccer club. Before loading, the players had 3 attempts of shooting into the middle of the goal by dominant and non-dominant leg. After loading, they had 3 attempts of shooting into the middle of the goal too, but only by dominant leg. We measured the speed and the accuracy of kicks before loading and after the maximum load. Results: The results of work give information about the impact of fatigue on the kick speed and accuracy of young soccer players. It has been found that after the impact of loading the soccer players had worse results in the studied parameters. Keywords: fatigue, kick, loading, skill, soccer
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Strength asymmetries in female soccer players depending on the player's post.
Lisoň, Maroš ; Ižovská, Jana (advisor) ; Šťastný, Petr (referee)
Title: Strength asymmetries of female soccer players according to playing position Objectives: The aim of this diploma thesis was to characterize the unilateral and bilateral asymmetries of knee flexors and extensors in elite football players based on player positions and to define the characteristic isokinetic strength profile for each playing positions. Methods: The research group consisted of 66 female football players who play in the highest czech league. The players completed laboratory testing under the supervision of qualified experts, which took place according to the standard conditions described in the methodological part of this study. In the case of players, we examined the strength asymmetries in the flexors and extensors of the knee and compared them between the 4 basic positions in football. Results: After summing the data from all angular velocities (60ř.s-1 , 180ř.s-1 , 300ř.s-1 ) we found that 33% of our attackers had quadriceps asymmetries above 10%, which was the most of all posts. This is followed by goalkeepers with 28% and midfielders with 25%. The lowest percentage of quadriceps asymmetries was recorded in defenders 22%. Even in the case of hamstrings, we recorded the most asymmetries (> 10%) in attackers, up to 46%. For midfielders and defenders, it was the same result for...
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Evaluation and setting of standards of conventional ratio of flexors and extensors of knee of young athletes
Ižovská, Jana ; Zahálka, František (advisor) ; Džupa, Valér (referee)
Title: Evaluation and determination of standard ratio of extensors and flexors of the knee in sporting youth. Objectives: The aim of the thesis is to establish the standards of the force ratio H: Q for the youth football categories U16, U17, U18, U19, U21 and adult players of the Czech Republic and based on the prescription type of study to establish a percentage critical disbalance of dynamic knee stabilizers which may be the most common cause of injuries to dynamic or static knee joint stabilizers in soccer players. Methods: The monitored group of players consisted of football players playing in elite Czech football clubs, both in youth and senior categories, who meet the predetermined selection criteria. The isokinetic strength parameters were monitored using a Cybex Humac Norm isokinetic dynamometer (Cybex NORM ®, Humac, CA, USA). We investigated maximum strength moment (PT) of extensors and knee flexors of dominant and non-dominant limb at concentric contraction at angular velocities of 60, 180 and 300ř.s-1 . Then we watched the players wounded. If the injury occurred, then we looked back at its strength characteristics and the strength ratio between the extensors and flexors of the knees and whether it was possible to predict the injury and determine the critical level that indicates the...
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Strength asymmetries in female soccer players depending on the player's post.
Lisoň, Maroš ; Ižovská, Jana (advisor) ; Šťastný, Petr (referee)
Title: Strength asymmetries of female soccer players according to playing position Objectives: The aim of this diploma thesis was to characterize the unilateral and bilateral asymmetries of knee flexors and extensors in elite football players based on player positions and to define the characteristic isokinetic strength profile for each playing positions. Methods: The research group consisted of 66 female football players who play in the highest czech league. The players completed laboratory testing under the supervision of qualified experts, which took place according to the standard conditions described in the methodological part of this study. In the case of players, we examined the strength asymmetries in the flexors and extensors of the knee and compared them between the 4 basic positions in football. Results: After summing the data from all angular velocities (60ř.s-1 , 180ř.s-1 , 300ř.s-1 ) we found that 33% of our attackers had quadriceps asymmetries above 10%, which was the most of all posts. This is followed by goalkeepers with 28% and midfielders with 25%. The lowest percentage of quadriceps asymmetries was recorded in defenders 22%. Even in the case of hamstrings, we recorded the most asymmetries (> 10%) in attackers, up to 46%. For midfielders and defenders, it was the same result for...
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Evaluation and setting of standards of conventional ratio of flexors and extensors of knee of young athletes
Ižovská, Jana ; Zahálka, František (advisor) ; Džupa, Valér (referee) ; Zahradník, David (referee)
Title: Evaluation and determination of standard ratio of extensors and flexors of the knee in sporting youth. Objectives: The aim of the thesis is to establish the standards of the force ratio H: Q for the youth football categories U16, U17, U18, U19, U21 and adult players of the Czech Republic and based on the prescription type of study to establish a percentage critical disbalance of dynamic knee stabilizers which may be the most common cause of injuries to dynamic or static knee joint stabilizers in soccer players. Methods: The monitored group of players consisted of football players playing in elite Czech football clubs, both in youth and senior categories, who meet the predetermined selection criteria. The isokinetic strength parameters were monitored using a Cybex Humac Norm isokinetic dynamometer (Cybex NORM ®, Humac, CA, USA). We investigated maximum strength moment (PT) of extensors and knee flexors of dominant and non-dominant limb at concentric contraction at angular velocities of 60, 180 and 300ř.s-1 . Then we watched the players wounded. If the injury occurred, then we looked back at its strength characteristics and the strength ratio between the extensors and flexors of the knees and whether it was possible to predict the injury and determine the critical level that indicates the...
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Strength as a determinant of kick speed of young soccer players.
Ižovská, Jana ; Malý, Tomáš (advisor) ; Zahálka, František (referee)
Title: Strength as a determinant of kick speed of young soccer players. Objectives: Identify the relationship of strength of extensors and flexors of knee and the kick speed and accuracy of young soccer players. Methods: The study group consists of 20 players in the age between 20-25 years (22,45±1,12 years) league level engaged in the provision of an elite soccer club. The players passed the tests of strength abilities week before field testing of kick speed and accuracy. Strength extensors and flexors of knee were measured in laboratory conditions at three different stages of the angular velocity of the dominant and nondominant lower leg. After week the players completed three shots on goal by preferred and non-preferred leg, where we measured the speed and accuracy of kick. Results: The results of work submit information about relationship between the strength of extensors and flexors of knee and the kick speed and accuracy depending on the degree of angular velocity. It has been found moderate - strong correlation between conditionings depending on the different degrees of angular speed of the movement. Keywords: accuracy, kick, skill, soccer, speed, strength
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The impact of fatigue on the kick accuracy of young soccer players
Ižovská, Jana ; Malý, Tomáš (advisor) ; Zahálka, František (referee)
Title: The impact of fatigue on the kick accuracy of young soccer players Objectives: Identify the relationship of fatigue and the kick accuracy of young soccer players. Methods: The study group consists of 20 players in the age between 17 and 22, who are actually operating on league level in the reserve of elite soccer club. Before loading, the players had 3 attempts of shooting into the middle of the goal by dominant and non-dominant leg. After loading, they had 3 attempts of shooting into the middle of the goal too, but only by dominant leg. We measured the speed and the accuracy of kicks before loading and after the maximum load. Results: The results of work give information about the impact of fatigue on the kick speed and accuracy of young soccer players. It has been found that after the impact of loading the soccer players had worse results in the studied parameters. Keywords: fatigue, kick, loading, skill, soccer
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