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Effectivity of localized and whole-body active recovery strategies after exhaustive isometric finger flexor performance
Sechterová, Hana ; Baláš, Jiří (advisor) ; Vomáčková, Helena (referee)
Author: Title: Objectives: Methods: Results: Bc. Hana Sechterová Effectivity of localized and whole-body active recovery strategies after exhaustive isometric finger flexor performance Determine the effect of localized and whole-body active recovery on repeated exhaustive isometric performance of fingers flexors. Determine the effect of systemic and muscle oxygen kinetics on level of recovery of fingers flexors during two types of active recovery. 7 men (age 31,3 ± 8,3) and 6 women (age 30,7 ± 8,1) underwent tests of systemic and muscle oxygen kinetics, then repeated intermitent isometric contractions of fingers flexors until exhaustion in three visits. The randomly chosen type of active recovery (with global enagaging of muscles, with isolated engaging of fingers flexors) was applied among tests until exhaustion. The performance of fingers flexors until exhaustion was measured in the intermitent test (8 s contraction, 2 s relaxation). Systemic oxygen kinetics (VO2max) was measured by using maximal oxygen consumption and ventilatory anaerobic threshold (VT2). Muscle oxygen kinetics was measured by using infrared spectroscopy. The relationship among systemic and muscle oxygen kinetics and decrease of fingers flexors performance until exhaustion was calculated using the Pearson correlation...
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Effect of two active recovery methods on repeated bouts of finger flexor isometric performance
Psohlavec, Lukáš ; Baláš, Jiří (advisor) ; Malý, Tomáš (referee)
Title: Effect of two active recovery methods on repeated bout of finger flexors isometric performance. Goals: Compare two methods of active recovery - global and local, during repeated isometric performance and learn the difference between active and passive recovery. Method: Ten recreational athletes in average age 30,4 ± 5,9 years performed in a random cross-over desing 3 sessions with 3 repeated isometric intermittent contraction. The effect of active global recovery, active local recovery and passive recovery between repetions was monitored. Results: More effective type of recovery was active recovery. There was no difference between both active recovery methods. Performed decrease in active global recovery was activleast effective method of recovery was passive recovery. Decrease in the time in active global recovery was 21,7s (29,77%) and in active local recovery 20,8s (30,1%). The least effective was passive recovery. There was decrease 24,6s (35,34%). Key words: recovery, active recovery, local recovery, finger flexors, interrmitent, isometric contraction.
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EMG study: Nordic hamstring exercises vs. isometric training
Kudláček, Jiří ; Slabý, Kryštof (advisor) ; Pokorný, Jan (referee)
Bibliographical record: KUDLÁČEK, Jiří. EMG study: Nordic hamstring exercises vs. isometric training. Prague: Charles Univerzity, 2nd Faculty of Medicine, Department of Rehabilitation and Sports Medicine, 2020, 79p. Supervisor MUDr. Kryštof Slabý. Abstract This thesis is an EMG study, which examines an electric activity of knee flexors and m. quadriceps femoris during 3 types of exercises: Nordic hamstring exercise, single leg sliding leg curl, and isometric contraction. The theoretical part summarizes anatomy, physiology, and kinesiology of the musculoskeletal system, as well as the principle of surface EMG. In the experimental part, the EMG study was conducted on 20 healthy individuals aged 20 to 30 years-old. Each patient underwent an applied kinesiology procedure and subsequently went through an 16 channel surface EMG technique. The aim of this work is to compare the maximal and average value of the EMG amplitude of particular muscles during each exercise. While providing Nordic hamstring exercise and single leg slide, the light was shed on a question of whether there is a statistically significant difference between activation of m. biceps femoris and m. semitendinosus in terms of EMG values. The following phase of the thesis scrutinized the timing of hamstring muscles during Nordic hamstring...
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Critical power and force during continuous and intermittent contraction of finger flexors
Malečková, Lucie ; Baláš, Jiří (advisor) ; Kodejška, Jan (referee)
Title: Critical power and force during continuous and intermittent contractions of finger flexors Objectives: The aim of the study was to determine critical force of finger flexors during continuous exercise and to determine critical power at different work - relief ratios during intermittent exercise. Methods: Eight participants volunteered in the study (age 23,1 ± 1,8 years, height 172,9 ± 7,3 cm, body mass 67,1 ± 4,8 kg, climbing experience 5,4 ± 2,1 years and climbing performance from 6 to 8 on the Union International des Associations d'Alpinisme scale). Participants undertook one continuous and three intermittent handgrip contractions (work to relief ratio of 8:2, 7:3, 6:4) to failure at 60% and 40% maximal voluntary contraction (MVC) for dominant and non-dominant hand, respectively. For continuous contraction, the critical force was calculated from two exercises at 40% and 60% MVC and inversed time to failure using linear regression analysis; for intermitent contraction, the critical power was calculated from the three contraction ratios and inversed time to failure using linear regression analysis. Results: Critical force for continuous contraction was found at 20,4 ± 5,9 % MVC. The critical power for intermittent contractions was considered not to be valid and is not indicated. Conclusion:...
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Effect of two active recovery methods on repeated bouts of finger flexor isometric performance
Psohlavec, Lukáš ; Baláš, Jiří (advisor) ; Malý, Tomáš (referee)
Title: Effect of two active recovery methods on repeated bout of finger flexors isometric performance. Goals: Compare two methods of active recovery - global and local, during repeated isometric performance and learn the difference between active and passive recovery. Method: Ten recreational athletes in average age 30,4 ± 5,9 years performed in a random cross-over desing 3 sessions with 3 repeated isometric intermittent contraction. The effect of active global recovery, active local recovery and passive recovery between repetions was monitored. Results: More effective type of recovery was active recovery. There was no difference between both active recovery methods. Performed decrease in active global recovery was activleast effective method of recovery was passive recovery. Decrease in the time in active global recovery was 21,7s (29,77%) and in active local recovery 20,8s (30,1%). The least effective was passive recovery. There was decrease 24,6s (35,34%). Key words: recovery, active recovery, local recovery, finger flexors, interrmitent, isometric contraction.
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