Bei jugendlichen Athleten wirken sowohl die körperliche Reifung als auch die erhöhte mechanische Belastung auf die Entwicklung des Muskel- und Sehnengewebes. Die Interaktion dieser beiden adaptationswirksamen Stimuli könnte, insbesondere bei Sportlern aus Sprungdisziplinen, Dysbalancen des Kraftpotenzials der Muskulatur und der Widerstandsfähigkeit der Sehne auslösen und somit potentiell das Verletzungsrisiko der Sehne erhöhen. Vor diesem Hintergrund untersucht die vorliegende Arbeit mittels Magnetresonanztomographie, Ultraschall und Dynamometrie die Entwicklung der morphologischen und mechanischen Eigenschaften der Knieextensoren und der Patellarsehne bei jugendlichen Kader-Volleyballathleten. Durch eine Querschnitts- und zwei Längsschnittstudien konnte Evidenz dafür erbracht werden, dass sich unter dem Einfluss der sportartspezifischen Belastung Kraft und Morphologie des Muskels in Relation zu den mechano-morphologischen Eigenschaften der Patellarsehne bei den jugendlichen Athleten nicht ausgewogen entwickeln, was zu einer erhöhten chronischen Belastung und Beanspruchung des Sehnengewebes führt. Darüber hinaus können muskulotendinöse Dysbalancen im Trainingsprozess durch erhöhte Fluktuationen der Muskelkraft und einer nicht-adäquaten Modulation der Widerstandsfähigkeit der Sehne zu episodischen Spitzen der mechanischen Beanspruchung der Sehne führen. Eine derart unausgewogene Entwicklung von Muskel und Sehne könnte für die Ausprägung von Überlastungsbeschwerden in der hier untersuchten Risikogruppe für Tendinopathien prädisponieren. Im Rahmen der Forschungsbemühungen wurde darüber hinaus ein Verfahren zur Vorhersage des Volumens von Oberschenkelmuskeln auf der Basis einfach zu erhebender Parameter entwickelt. Durch das Verfahren ließe sich zukünftig der Zeit- und Kostenaufwand muskelmorphologischer Diagnostik deutlich reduzieren. / In adolescent athletes, the development of muscle and tendon tissue is influenced both by maturation and mechanical loading. The interaction of these two driving stimuli could initiate imbalances in the development of the muscle strength capacity and tendon stiffness, especially in athletes from sports that feature a high frequency of jumps. A consequence could be an increased mechanical demand placed upon the tendon by the working muscle, which might increase the risk of tendon injury. Considering the lack of information on the effects of maturation and superimposed mechanical loading on the muscle-tendon unit during adolescence, the present work examines the development of the morphological and mechanical properties of the knee extensors and patellar tendon in adolescent elite volleyball athletes by means of magnetic resonance imaging, ultrasound and dynamometry. A cross-sectional comparison and two longitudinal studies provided evidence that the two-fold stimulus of sport-specific loading and maturation results in and imbalanced development of muscle strength and morphology in relation to the mechano-morphological properties of the patellar tendon in mid-adolescent volleyball athletes and results in increased tendon stress and strain. Moreover, during a training process, fluctuations of muscle strength and an inadequate modulation of tendon stiffness initiate episodes of high-level tendon strain during maximum muscle contractions. Such an imbalanced development of muscle and tendon could predispose for the development of tendon overuse injury in adolescent volleyball athletes, which are known to be at high risk of developing tendinopathy. Moreover, in the context of the described research endeavour, a method for the volume prediction of thigh muscles on the basis of easily measurable parameters has been developed, which could greatly reduce the time and costs involved in the diagnostics of muscle morphology in the future.

The ain of this graduation theses was to look in to possible muscles dysbalances in group of football players in the age between 21 ? 33 years old. Then compensatory exercise were made and they were placed them in to the football training program for 2 or 3 months long period. At the and there made check out examination and evaluation of muscles dysbalances and effectivity of compensatory exercises. There was hypothesis of appearance of the lower cross syndrome in tested group of football players which during entry examination verified. After going through the compensatory exercises there was definitely lower number of lower cross syndrome. In this graduation theses there ware used methods of specifie measurement and testing procedure.

The diploma thesis deals with the problem of muscle imbalances in pre-pubertal children and its relationship with their free time activities. The selected exercises were tested for the muscles involved in the lower and upper cross syndrome. On the basis of the measured results, the frequency of shortened / weakened muscles and muscles in the physiological standard were compared. A questionnaire survey was used to identify preferences of children concerning leisure activities. Based on the data obtained from the comparison of the data found in the questionnaire and the results measured during the testing of the muscles, the following topics were addressed: Whether the muscular condition is influenced by the sex, the frequency of sport activities performed and the type of sport practiced. In addition, the influence of parents' and their lifestyle.

Title: Influence of the compensation program for athletes in the Greco-Roman wrestling. Objectives: This diploma thesis concerned with an evaluation of the postural and phasic muscles on the group of ten Greco-Roman wrestling fighters at the age from 16 to 17. Methods: For the assessment of the muscular inequality we used input and output measurements and based on the findings we have chosen the intervention program according to recommended literature. We applied the intervention program to the training units for four months. At the end of the diploma thesis we evaluated the significance of our program using output measurements according to the captured photographs, which we evaluated: fulfilled = 1, failed = 2. We used the Wilcox test to calculate the statistical significance. Results: The worst results were found in the area of postural muscles of m.erector truncata and phasic muscles of m.rhomboideus. The best results were achieved in the area of postural muscles of m.sternocleidomastoideus in a forward bend and in the area of the biceps femoris. The best results of the phasic muscles were achieved in the area of m.rhomboideus. At the end of this thesis it is statistically confirmed that applied intervention program eventually results in the significant difference between the initial and final...

Title of the thesis: Selected diagnostic procedures during the annual macrocycle of the floorball season which are used to demonstrate a specific asymmetry in floorball players Aims of the thesis: The aim of this work is to identify and analyze the specific time period during the floorball season, which is characteristic with the biggest muscle asymmetry caused due to a specific exercise load that floorball demands. Methods: The research was conducted among elite floorball teams of the top men's floorball competition in the Czech Republic and the tested research group included only male professional athletes. The probands (n = 18 input measurements, n = 10 output measurements) took a total of four complex measurements. Testing was held once before the pre-conditioning period, once during the main course and twice before the playoff. Missing data was supplemented and approximated by the method of multiple imputations in Mplus software. Selected body composition parameters were evaluated, tested and measured on various measuring instruments and machines such as Tanita MC-980MA. The footscan® systems were used to measure postural stability. The explosive force was measured using Kistler force plates and the Cybex Humac Norm isokinetic dynamometer was used to determine the muscle strength of the lower...

Title: Use of compensatory exercises for footballers in the youth sports center Objectives: The aim of the work is to identify the most common muscle imbalances and to create a compensation program for football players in the category of younger students U12 and U13 in the youth sports center. Methods: The research was based on the diagnosis of players using test exercises, which focused on the occurrence of muscle imbalances and erroneous movement stereotypes according to Bursová (2005), Hošková & Matoušová (2007) and Bursová et al. (2003). Detection was provided by selected functional muscle tests, which were applied in the input and output measurements. Correct performance of the exercise was evaluated as number 1. Incorrect performance was evaluated as number 2. After the initial measurement and evaluation of the degree of muscle imbalances, a compensation program was designed, whose primary task was to eliminate or alleviate muscle imbalances of individual players. The final measurement was used to verify the effectiveness of the compiled compensation program. A one - sample nonparametric Wilcoxon test was used in the work, the task of which was to confirm the validity of the used tests. Results: Due to the fact that the results of selected probands improved in most of the test exercises...

In den letzten Jahrzehnten ist die Zahl der Erwachsenen und Jugendlichen, die an nicht organisierten oder wettbewerbsorientierten Sportarten teilnehmen, gestiegen. In der Pubertät beeinflussen sowohl hormonelle Veränderungen als auch mechanische Belastungen die Entwicklung von Muskeln und Sehnen. Derzeit gibt es keine Informationen über die Interaktion dieser beiden Stimuli, aber es besteht die Vermutung, dass im Zuge der Pubertät bei Athleten und Nicht-Athleten im Vergleich zu Muskelkraft und Sehnensteifigkeit ungleiche Verhältnisse auftreten können. Die Folge dieses Ungleichgewichts könnte eine höhere mechanische Belastung für die Sehnen sein, was weiter zu Verletzungen führen kann. Angesichts der unzureichenden Beweise für die Entwicklung des muskulotendinösen Gewebes während der Pubertät und des Mangels an Kenntnissen darüber, wie die Reifung die Muskel-Sehnen-Einheit, insbesondere die Interaktion mit überlagerten mechanischen Belastungen, beeinflusst, untersucht diese Arbeit die morphologische und mechanische Entwicklung von Knieextensoren und Patellasehne, indem Nicht-Athleten und Athleten aus drei Altersgruppen verglichen werden (frühe Pubertät: 12–14 Jahre, engl.:EA; späte Pubertät: 16–18 Jahre, engl.: LA; Erwachsene: 20–35 Jahre, engl.: YA). Athleten erreichten häufiger Dehnungsgrößen von mehr als 9% Dehnung im Vergleich zu Nicht-Athleten, was auf einen erhöhten mechanischen Bedarf an der Sehne hinweist. Obwohl das Training die Eigenschaften der M. quadriceps femoris-Sehnen-Einheit verbessert, bleibt ihre Entwicklung von früher Pubertät bis zum Erwachsenenalter bei Athleten und Nicht-Athleten ähnlich, mit dem Hauptunterschied zwischen früher Pubertät und später Pubertät. Alter und sportliches Training waren jedoch mit einer höheren Prävalenz von Ungleichgewichten innerhalb der Muskel-Sehnen-Einheit und einer damit einhergehenden erhöhten mechanischen Belastung oder Beanspruchung für die Patellasehne verbunden. / In recent decades, the number of adults and especially adolescents who participate in some kind of non-organized or competitive sports has been increasing. During adolescence, the development of muscle and tendons is affected both by maturation, due to hormonal changes, and by mechanical loading. However, there is no information currently on the interaction of this double fold stimulus although there is reason to believe that during adolescence in athletes and non-athletes there may be imbalances developing between muscle strength capacity and tendon stiffness. The result of this imbalance could be the tendon exposure to high mechanical demand by the associated working muscles, which might further lead to tendon injury. Considering the not satisfactory evidence of the musculotendinous tissue development during adolescence, and the lack of knowledge about how maturation affects the muscle-tendon unity, especially in interaction with superimposed mechanical loading, this thesis investigates the morphological and mechanical development of the knee extensors and patellar tendon, by comparing non-athletes and athletes in three different age groups (i.e., early adolescents: EA 12–14 years; late adolescents: LA 16–18 years, and young adults: YA 20–35 years). Athletes were more likely to reach strain magnitudes higher than 9% strain compared to non-athlete controls indicating an increased mechanical demand for the tendon. Although athletic training enhances the properties of the quadriceps femoris muscle-tendon unit, their development from early-adolescence to adulthood remains similar in athletes and non-athletes with the major alterations between early and LA. However, both age and athletic training were associated with a higher prevalence of imbalances within the muscle-tendon unit and a resultant increased mechanical demand for the patellar tendon.

Title Outdoor excercising - muscle imbalance reduction instrument Summary This thesis main topic is pre-school children muscle imbalance problems. Theoretical part deals with importace of execercising for pre-school children and postural functions together with respiratory systems using the Matthias test are pointed out in theoretical part. Next part deals with a mapping of possible physical activities which can help to eliminate muscle imbalances. The main topic of practical part is children appliance physical system and bellows vital capacity analysis. In next part is evaluated muscle imbalances caused by outdoor games and activities and children respiratory system. Then is mentioned influence of outdoor exercising regarding to indoor activites in nursery schools. There is also mentioned possible influence of outdoor activities outside of nursery schools on pre-school childern optimal posture. The main goal of this thesis is to find out if movement activities and outdoor excercising influence posture positively and prevent muscle imbalance of pre-school childern. Key words Muscle imbalance, pre-school, correct and faulty posture, Matthias test, outdoor exercising, indoor activities in nursery school.

Title: Determination of the occurrence of poor posture and muscle imbalance of female students agend 15-19 and possibilities of influencing that by elements of health physical education. Objectives: The aim of this study is determination of change in posture and muscle imbalance due to regural health exercise for the period of 3 months Methods: Klein, Thomas and Mayer test method was used to determine posture of each proband. Functional tests of muscles with tendency to shorten were performed according to Bursová (2005), Hošková and Matoušová (2000), Pernicová et al. (1993). Functional tests of muscles with a tendency to become flabby were tested according to Hošková and Matoušová (2000). The method of theoretical analysis and synthesis was used for the chapter "Piece of knowledge" (Štumbauer, 1990). The chapter "Knowledge of data" was processed by Microsoft Office Excel. One-piece non-parametric Wilcoxon test was used to verify the results. Results: In the chapter "Results" we find detailed information about probands, which we have gained from the questionnaire and from a personal interview. Each proband is discussed and evaluated by means of testing posture and muscle imbalance. Keywords: posture, muscle imbalance, muscle balance, testing, tight muscles, flabby muscles, health physical education,...