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Physiological responses on standardized climbing task in sport climbers
Gajdošík, Jan ; Baláš, Jiří (advisor) ; Radvanský, Jiří (referee)
Title: Physiological responses on standardized climbing task in sport climbers Purpose: To determine the effect of height, wall angle, climbing speed and climbing ability on physiological responses in sport climbers. Methods: The study was divided into three parts. 75 sport climbers (36 female and 39 male) completed differing tests on climbing wall and motorized climbing ergometer. Perceived exertion was assessed on a scale suggested by Borg. Indirect calorimetry, venous blood samples and near-infrared spectroscopy were used to assess physiological response, hormonal response and muscle oxygen saturation, respectively. Results: Perceived exertions were higher when climbing to height as opposes to climbing low to the ground on the treadwall (+5,3%; P = 0,013; ηp 2 = 0,149) (Study 1A). The physiological response was higher on the climbing wall as opposed to the treadwall: V̇ O2 (+6%; P = 0,03; ηp 2 = 0,22), SF (+4%; P = 0,04; ηp 2 = 0,20), V̇ E (+9%; P = 0,01; ηp 2 = 0,30) a EC (+16%; P < 0,001; ηp 2 = 0,48). There was an interaction for climbing ability and post- climbing catecholamine concentration (P < 0,01, ηp 2 = 0,28) (Study 1B). With increasing climbing speed greater differences were found for V̇ O2 (P < 0,001, ηp 2 = 0,923) than for StO2 (P < 0,001, ηp 2 = 0,448). Between-subject effect...
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Physiological responses on standardized climbing task in sport climbers
Gajdošík, Jan ; Baláš, Jiří (advisor) ; Radvanský, Jiří (referee) ; Vajda, Matej (referee)
Title: Physiological responses on standardized climbing task in sport climbers Purpose: To determine the effect of height, wall angle, climbing speed and climbing ability on physiological responses in sport climbers. Methods: The study was divided into three parts. 75 sport climbers (36 female and 39 male) completed differing tests on climbing wall and motorized climbing ergometer. Perceived exertion was assessed on a scale suggested by Borg. Indirect calorimetry, venous blood samples and near-infrared spectroscopy were used to assess physiological response, hormonal response and muscle oxygen saturation, respectively. Results: Perceived exertions were higher when climbing to height as opposes to climbing low to the ground on the treadwall (+5,3%; P = 0,013; ηp 2 = 0,149) (Study 1A). The physiological response was higher on the climbing wall as opposed to the treadwall: V̇ O2 (+6%; P = 0,03; ηp 2 = 0,22), SF (+4%; P = 0,04; ηp 2 = 0,20), V̇ E (+9%; P = 0,01; ηp 2 = 0,30) a EC (+16%; P < 0,001; ηp 2 = 0,48). There was an interaction for climbing ability and post- climbing catecholamine concentration (P < 0,01, ηp 2 = 0,28) (Study 1B). With increasing climbing speed greater differences were found for V̇ O2 (P < 0,001, ηp 2 = 0,923) than for StO2 (P < 0,001, ηp 2 = 0,448). Between-subject effect...
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Movement economy and physiological response during differing climbing speeds in sport climbers
Podoba, Peter ; Baláš, Jiří (advisor) ; Heller, Jan (referee)
Title: Movement economy and physiological response during differing climbing speeds in sport climbers. Aims: The work aims to evaluace climbing economy and physiological responses of intermediate and advanced climbers in different climbing speeds. Methodology: 32 climbers (11 advanced men, 11 intermediate men, 10 intermediate women) performed 3 submaximal tests in treadwall at slope of 90ř at speeds 4, 6 and 9 m.min-1 . Each of the tests lasted exactly 4 minutes. Oxygen consumption (VO2), heart rate (HR), ventilation (VE), respiratory ratio (RER) and energy expenditure were monitored. Results: Advanced men reported lower energy expenditure than intermediate men in all climbing speeds (4 m.min-1 : -0,06 kcal.kg-1 , P = 0,007; 6 m.min-1 : -0,06 kcal.kg-1 P = 0,048; 9 m.min-1 : -0,07 kcal.kg-1 P = 0,022). Intermediate women reported only slightly lower energy expenditure than intermediate men (4 m.min-1 : -0,01 kcal.kg-1 P = 0,051; 6 m.min-1 : 0,06 kcal.kg-1 P = 0,091; 9 m.min-1 : -0,03 kcal.kg-1 P = 0,115). Energy expenditure was significantly lower at 4 m.min-1 than at 6 m.min-1 (-9,82 kcal, p = 0,001) and also signicantly lower at 6 m.min-1 than at 9 m.min-1 (-8,3 kcal, p = 0,001). Advanced men reported significantly lower VO2 at speeds 4 a 6 m.min-1 (- 2,2 ml.kg- 1 .min-1, P = 0,022; -3,9 ml.kg-1...
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Climbing in children and youth: acute physiological responses to climbing and their implications for upper body strength.
Zozul'áková, Michaela ; Bunc, Václav (advisor) ; Nosek, Martin (referee) ; Krobot, Alois (referee)
Title: Climbing in children and youth: acute physiological responses to climbing and their implications for upper body strength. Objectives: The aim of this thesis was to determine the physiological responses of children and youth to climbing and its implications for upper body strength. Methods: One hundred and twelve children (aged 9,8 ± 1,4 years) participated across two studies. Study one (91 children) explored the effects of climbing on upper body strength, with the aid of a battery of climbing specific tests (bent arm hang on the trapeze, finger hang on the wooden bar and maximal hand grip with the manual dynamometer). These tests were designed for the measurement of the key muscle groups involved in climbing. Study two (21 children) assessed acute physiological response to climbing using the indirect calorimetry method. Energy expenditure was used as an indicator of the climbing skills and to express the total climbing work completed. Study two lasted for 16 weeks, during this time the children underwent three measurements. Instructors recorded the routes climbed and their difficulty during each session. The period of the study corresponded with the duration of the climbing course for children during the school year. The results of the acute physiological response of children during climbing...
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Atmosférický DC koronový výboj v N2-NO směsích: energetická účinnost a cena odstranění NO
Pekárek, S. ; Šimek, Milan
This paper focuses on de-NOX efficiency of the DC atmospheric pressure positive corona discharge enhanced by the flow of the mixture of nitrogen with traces of NO. The experimental findings indicate that the transformation of nitric oxide is controlled by the production of atomic nitrogen. For a particular energy density the NO decomposition increases with flow rate and higher NO removal is obtained for lower initial NO concentrations. Production of NO2 increases with increasing NO removal and NO removal energy cost for energy densities exceeding 2 kJ/m3 converges to about 100 eV/molecule. Providing that the removal of NO is predominantly driven by N atoms this would imply that the specific energy cost for the dissociation of N2 is approximately 200 eV/molecule.
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