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Analysis of a pressure distribution on the level of foot and shoe interaction when running in flatlands with minimalist and sport shoes.
Charousek, Jan ; Jandová, Soňa (advisor) ; Zvonař, Martin (referee) ; Zahradník, David (referee)
Problem: Running is one of the most widespread physical activities. Incorrect running technique, training quantity but also the runner's equipment can strongly affect health condition of the individual, both positively and negatively. For that reason various trends emerge in the area of running footwear. They include classical sports shoes with different types of impact attenuation as well as the minimalist footwear made to imitate barefoot running, which should be much more natural for humans, as insisted by B. Nigg in his book "Born to Run" - where he says that man was born to walk and run barefooted. Inappropriate shoes can cause various health complications, not only in the foot area. Objective: To find out how foot strike changes in the area of the foot-shoe interaction in running on flat ground when an amateur runner uses minimalist and sports footwear and to draw conclusions for training practice on the basis of the results. Methods: The thesis deals with amateur endurance running in different shoe types (minimalist and sports shoes). The study specimen consisted of 14 female runners (mean body weight 63,31 ± 4,89 kg, height 169,69 ± 4,71 cm, age 31,92 ± 5,34 years, speed in minimalist shoes (MO) 3,34 ± 0,06 m.s- 1 , speed in sports shoes (SO) 3,29 ± 0,06 m.s-1 , weekly mileage 37,54 ± 9,43...
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Analysis of a pressure distribution on the level of foot and shoe interaction when running in flatlands with minimalist and sport shoes.
Charousek, Jan ; Jandová, Soňa (advisor) ; Zvonař, Martin (referee) ; ZAHRADNÍK, DAVID (referee)
Problem: Running is one of the most widespread physical activities. Incorrect running technique, training quantity but also the runner's equipment can strongly affect health condition of the individual, both positively and negatively. For that reason various trends emerge in the area of running footwear. They include classical sports shoes with different types of impact attenuation as well as the minimalist footwear made to imitate barefoot running, which should be much more natural for humans, as insisted by B. Nigg in his book "Born to Run" - where he says that man was born to walk and run barefooted. Inappropriate shoes can cause various health complications, not only in the foot area. Objective: To find out how foot strike changes in the area of the foot-shoe interaction in running on flat ground when an amateur runner uses minimalist and sports footwear and to draw conclusions for training practice on the basis of the results. Methods: The thesis deals with amateur endurance running in different shoe types (minimalist and sports shoes). The study specimen consisted of 14 female runners (mean body weight 63,31 ± 4,89 kg, height 169,69 ± 4,71 cm, age 31,92 ± 5,34 years, speed in minimalist shoes (MO) 3,34 ± 0,06 m.s- 1 , speed in sports shoes (SO) 3,29 ± 0,06 m.s-1 , weekly mileage 37,54 ± 9,43...
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Kinesiological changes of feet by wearing barefoot
Vondrášková, Anna ; Tolar, Jan (advisor) ; Demeková, Júlia (referee)
The bachelor thesis deals with the possible influence of barefoot shoes on kinesiology and kinetic parameters of gait. In the theoretical part there is a brief description of anatomy of the human foot, foot arch and movements. The kinesiology of gait is also described here. The theoretical part also deals with the problem of walking in barefoot shoes and explaining the basic parameters of barefoot shoes. Finally, the results of studies already underway on this issue are summarized. In the practical part we have devoted our research to the selected gait parameters that can be influenced by the wearing of barefoot shoes. The measurements were carried out on two groups of subjects, each with 6 tested persons, one of whom wore barefoot shoes instead of normal shoes, and the other subject did not wear barefoot shoes. The data was measured on the Zebris FDM by walking analysis. The results were then compared between the two subject groups. These gait parameters were measured and evaluated: step length, maximum pressure on the variant parts of foot during walking, and contact time of each part of foot with the surface. The resulting values showed a trend mainly in the load of the foot, in the sense of higher pressure mainly on the area of the middlefoot. Also, the contact time with the surface showed...
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Hydrodynamika bubliny narážející na stěnu. Experiment a modelování
Zedníková, Mária ; Vejražka, Jiří ; Růžička, Marek ; Drahoš, Jiří
The contribution deals with both experimental and theoretical investigation of collision of a bubble with a horizontal hydrophobic (glass) surface. The terminal bubble velocity, impact velocity, contact time of bubble with the wall and restitution coefficient (ratio of restitution and terminal velocity) are evaluated (by means of a high-speed camera) as a function of bubble size, which is ranging from 0.34 to 2.07 mm. The experimental results are compared with the models based on a balance of forces acting on a bubble during the interaction process. A good agreement is showed between the experimental data and theoretical predictions.
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