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Comparison of the kinematic indicators of the front kick without and with the military load carried
Tesař, David ; Vágner, Michal (advisor) ; Oláh, Vladan (referee)
Title: Comparison of the kinematic indicators of the front kick without and with the military load carried Objective: The study aimed to determine the differences between executing a front kick without carrying the military load and with a 30 kg military load., also in connection with the possible differences between the group of elite and sub-elite military personnel. The distances between the right and left hip, knee and ankle in the individual axes of the coordinate system, the angles in the knee joint of the kicking and standing lower limb and the maximum velocity of the hip, knee and ankle of the kicking lower limb upon impact into the fixed target were compared. Methods: The diploma thesis was processed as a quantitative comparative study. The research group consisted of 12 chief instructors of the Czech Armed Forces in close combat (Age 41 ± 8 years; Weight: 83 ± 6 kg; Height: 178 ± 5 cm) and 21 students of the Military Physical Education at the Faculty of Physical Education and Sports of Charles University in Prague (Age 23 ± 2 years; 81 ± 10 kg Weight; 182 ± 7 cm Height). The velocity and positions of individual segments were captured using the Qualisys camera system and subsequently extracted using the Qualisys Track Manager. The Shapiro-Wilk test was used to assess the normal...
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Efficacy of the unimodal physiotherapy intervention Running Gait Retraining in the treatment of runners' iliotibial band syndrome - a systematic review
Stehlíková, Alžběta ; Pavlů, Dagmar (advisor) ; Reckziegelová, Petra (referee)
Title: Efficacy of the unimodal physiotherapy intervention Running Gait Retraining in the treatment of runners' iliotibial band syndrome - a systematic review Objectives: The aim of the thesis is to evaluate whether the unimodal physiotherapy intervention running gait retraining is an efficacious treatment of the iliotibial band syndrome in runners. Methods: The thesis was carried out in the form of a systematic review. Eligible studies were searched for in the following electronic databases from December 2023 to January 2024: PubMed, SCOPUS, SPORTDiscus, Web of Science. Selected studies which met the specified inclusion criteria were then analysed to answer the research question, i.e. whether it is efficacious to use running gait retraining only to treat runners with iliotibial band syndrome. Results: Only 1 study met the inclusion criteria (an experimental case study), the results of which suggest that running gait retraining used as a unimodal physiotherapy intervention in the treatment of the runners' iliotibial band syndrome might be an efficacious therapeutic approach. Considering the low-level evidence of the included study, however, the results cannot be generalized. In the future, the efficacy of this treatment approach needs to be evaluated on the basis of a larger scale research of a...
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Analýza tlaku chodidla na podložku při různých rychlostech běhu
Pevná, Barbora ; Pavelka, Jan (referee) ; Korvas, Pavel (advisor)
The bachelor thesis deals with the analysis of foot pressure with increasing running speed. The Medilogic WLAN insole system was used to record foot pressure over time. The thesis describes running biomechanics, running technique, stride technique and devices used for running analysis. One part of the thesis deals with the anatomy of the lower limbs. Two groups of runners were measured during the research. The first group consisted of 10 orienteering runners and the second group consisted of 10 middle and long distance runners. All runners completed eighteen 50 metre sections at gradually increasing running speeds. The data collection and processing are described in the methodological part of the thesis. From the measured data it was found that athletes and orienteers run with different techniques. Differences between the groups were found in pressure values, load ranges and power values. Athletes use the swing running technique earlier and use more forefoot than orienteers as running speed increases. The final section of the thesis includes a discussion that evaluates the benefits and limitations of the work.
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Relationship between hip muscles and dynamics front kick while using ballistic vest and backpack
Maleček, Jan ; Vágner, Michal (advisor) ; Šťastný, Petr (referee)
Title: Relationship between hip muscles and dynamics front kick while using ballistic vest and backpack. Objective: Determine the rate of the relationship among isokinetic strength of hip muscles during flexion and extension movement, external and internal rotation and the dynamics of the front kick while using the military personal protective equipment. The method: The master thesis corresponds with an empirically based study of observational type. The measured research sample consisted of students (n = 15) of Military Department attending full-time and combined form of study at the Faculty of Physical Education and Sport of Charles University in Prague. Dynamics of front kick were measured by dynamometric Kistler plates and evaluated through computer software BioWare. Isokinetic strength of hip muscles during flexion and extension movement, external and internal rotation was tested and rated by isokinetic dynamometer Humac Norm. The flexibility of selected muscles group was measured by a specialist in physiotherapist area. The Spearman rank correlation coefficient of the order (rs) was chosen for the final evaluation of the rate of relationship. The results: The strongest correlation relationship was between the external hip rotation muscles (at speed 90 řs-1 ) and the impact force on the...
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Stress and strain analysis of femoral intramedullary nail fixation and tapes
Lamrich, Martin ; Marcián, Petr (referee) ; Florian, Zdeněk (advisor)
The presented Master’s Thesis aims at determining stress and strain analysis of femur with fracture fixed by intramedullary nail and cerclage cable. The one of the goals of this work was create computational model which will be able simulate problem. Computational model consist of model of femur , it’s geometry was created on basis of CT data, than there was created model of intramedullary nail and cerclage cable on a basis of real objects. In this work was created simply model of femur with the same material features and characteristic proportions as analyzed model of femur. On this model was investigated direct impact of cerclage cables on deformation, respectively displacement in a surroundings of femoral fracture. On a final model were applied the real loads conditions. Preload in a cerclage cable was simulated by cooling down to a temperature from analytical calculation. Concluding analysis was powered by Finite Element Method (FEM) applied in system ANSYS Workbench 14.5 . Due to a results of analysis, we could say that using cerclage cables in combination with intramedullary nail is an effective way for healing femoral shaft fractures.
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Characteristics of gels used in the fluids engineering
Hudák, Igor ; Habán, Vladimír (referee) ; Fialová, Simona (advisor)
Not only in common life, but also in the technical area the usage of gels presents some kind of standard. Gels offer a unique possibility of usage in numerous areas. The gel structure itself is a very interesting material however it’s hard to specify its characteristics. The gel system presents a huge macromolecular network which enables to observe its different characteristics in comparison to other materials. In some circumstances gels act almost as conventional materials, in other circumstances, however, they act significantly otherwise. Therefore this bachelor thesis deals with a description and summarization of single characteristics of gels in chosen branches of the mechanical engineering industry where gels are used on a daily basis, such as sealant of pipeline systems, wires or electronic components. The thesis also describes principles of gel formation, with the emphasis to building of gel substance and with respect to its mechanical and physical features. In the end, the thesis gives a comparison of chosen characteristics of gels that are used as sealants and gels that are used for encapsulation of electrical set.
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Stress-strain analysis of artery with atheroma
Janík, Rostislav ; Fuis, Vladimír (referee) ; Burša, Jiří (advisor)
This master thesis analyses stress and strain of iliac artery with atheroma. Model of artery is created as 3D and symmetric in the longitudinal cut. The first part of the thesis deals with a research, which includes obtaining information from medicine, which is necessary fort the right solution of the task. Next part dedicates to nonlinear mechanics, constitutive modeling from the view of biomechanice and computational modeling of arteries. In the next part is made analysis for load on artery by increased blood pressure. In the end were specified uncertainties of the used model and evaluated chance of atherosclerotic plaque rupture.
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Use of Retomo software for computational modeling in biomechanics
Filková, Alena ; Lisický, Ondřej (referee) ; Marcián, Petr (advisor)
This bachelor thesis deals with the issue of musculoskeletal biomechanics. More precisely, of creating a geometry model based on CT data using the RETOMO program and then a computational model. The introductory part is devoted to a brief explanation of the concepts of computed tomography and finite element methods. The following chapter provides a search of programs used to create models of geometry from CT data in biomechanics. Furthermore, the work deals with the description of selected functionalities and user environment of the RETOMO program, with the greatest emphasis on the creation of a geometry model from CT data. During the implementation of the bachelor's thesis, two models of geometry were created in the analysed program, using different segmentation functions, which were then compared with each other and then compared with a model of geometry created in another program. The GOM Inspect program was used to compare the geometry deviations of individual models. Finally, computational models were created using the CATIA program and then deformation and stress analysis was performed using the ANSYS program. The results of individual solutions were analysed, compared and evaluated.
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Biomechanical aspects of the reconstruction of the acetabulum
Slávik, Ondrej ; Marcián, Petr (referee) ; Florian, Zdeněk (advisor)
The research part of bacelor’s thesis Biomechanical aspects of the reconstruction of the acetabulum is dealing with historical development and current methods of solving the issue of pathological hip joints in case when use of total endoprosthesis is not suitable, for example in children. Also the anatomical view, related to the given problem situation, is outlined and the most significant disorders of the hip joint, which are connected with these cases, are characterized. In the practical part of this work, there are results of the analysis model between pathological and physiological hips analyzed and qualitatively compared, followed by the solution of the concact forces in these two situations.
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Mechanical Analysis of the Influence of Fabrication Tolerances on Contact Conditions between the Acetabular Cup and the Femoral Head in Total Hip Replacement
Koukal, Milan ; Horyl, Petr (referee) ; Repko, Martin (referee) ; Janíček, Přemysl (referee) ; Florian, Zdeněk (advisor)
In endoprosthesis surgery there are typically a high percentage of implant defects, these can lead to failure of the whole prosthesis. One type of total hip replacement function loss is acetabular cup loosening from the pelvic bone. This disertation examines manufacture perturbations as one of the possible reasons for this kind of failure. Both dimension and geometry manufacturing perturbations of ceramic head and polyethylen cup were analyzed. We find that perturbations in the variables analysed here affect considered values of contact pressure and frictional moment. Furthermore, contact pressure and frictional moment are quantities affecting replacement success and durability. From obtained results it can be recommended to fit head and cup with a clearance of between 0 mm and 0.05 mm. It can not be recommend using interference type of fit because of strong deterioration of the contact conditions. Roundness perturbation of ceramic head should not exceed 0.025 mm.
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