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Wyszukujesz frazę "Skopek, Martin" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
A Comparative Analysis of the Kayak Forward Stroke
Autorzy:
Skopek, Martin
Bacakova, Radka
Bily, Milan
Tunkova, Kristyna
Powiązania:
https://bibliotekanauki.pl/articles/1922209.pdf
Data publikacji:
2019-06-05
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
counterflow pool
kayak
paddling
surface electromyography
Opis:
This work follows previous research in the field which investigated the comparison of two types of paddling. These studies, however, focused on the similarity of kayaking and trainers, more precisely ergometers, that are used by racers during their training in the winter. However, the results of these studies indicate a significant difference in muscle involvement. Aim of Study: The aim of this study is to describe and to compare the muscle activation of the kayak forward stroke performed in a pool with an opposite/counter current and on flat/calm water. Material and Methods: The research was conducted via a selected sample of eight kayakers (subjects) who had attained a high level of performance in whitewater slalom. We observed the activity of twelve selected muscles used during the kayak forward stroke performed in a counterflow pool and on flat water by means of surface electromyography and kinematic analysis. Study results point to effects in relation to intraindividual and subsequently inter-individual muscle timing and the size of the muscle activation due to maximal voluntary contraction. We used comparative analysis and the data were measured by surface electromyography and 2D video-analysis. Results: The results proved equal timing of muscles in a counterflow pool and on flat water. The muscle activity in the counterflow pool was bigger than on flat water. Conclusion: From our results we can recommend a pool which makes use of a counter current as a replacement training tool. Compared with other training devices which might be used (such as, crank ergometers, paddling trainers, and paddling pools), this kind of training device gives the kayaker one great advantage. It is the fact that the kayaker has the same placement of the fixed point and the preservation of the feeling of grasping water.
Źródło:
Physical Activity Review; 2019, 7; 107-113
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Conconi Test - Searching for the Deflection Point
Autorzy:
Hnizdil, Jan
Skopek, Martin
Nosek, Martin
Louka, Oto
Musalek, Martin
Heller, Jan
Powiązania:
https://bibliotekanauki.pl/articles/1922199.pdf
Data publikacji:
2019-08-07
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
anaerobic threshold
heart deflection point
heart rate
Opis:
The Conconi Test (CT) is an incremental exercise test characterized by stages of equal intensity. For analysis speed (S) and HR (heart rate) are used. The deflection point of the HR/S graph marks the point where the linear relation between S and HR changes to a curvilinear one. As Conconi stated HR at deflection point represents anaerobic threshold (AT) value. Purpose of this study was to extend our previous research dealing with reliability and validity aspects of CT. Material and Methods: During 10 years (2007-2017) we tested 2 500 subjects using Conconi protocol. Tested were mainly football players and smaller number of runners (long distance and cross country) different ages and fitness level. Some subjects were tested repeatedly during the years. Initial speed of the running treadmill test was determined in the range of 10 to 12 km·h-1, according subjects age and fitness level. Speed was increased gradually every 150 m of 0.5 km·h-1 to the maximum speed when further increases were impossible. HR was recorded at every 150 meters. From a graphical representation dependence HR on increasing running speed we tried to find apparent diversion from the curve of linearity, labeled by Conconi as "deflection point" (DP). Simultaneously respiration values were recorded. From these respiration data we determined the ventilatory threshold (VT2) as a metabolic marker of the onset of blood lactate accumulation. Results: We found 6 types of response HR to increasing speed. a) regular DP; b) linear regression r ≥ 0.98 - no DP; c) linear regression r < 0.98 - no DP; d) inversion character of deflection point; e) DP not corresponding with value of ANP; f) more than one DP. As an AT predictor compared with VT2, Conconi test overestimated this value (0.5 km·h-1). Conclusion: Using of Conconi test as a predictor of ANP has a limitation. ANP values determined by CT are overestimated (0.5 km·h-1). Test stability of CT is very low and there is evidence that DP is not 100% repeated physiology phenomena.
Źródło:
Physical Activity Review; 2019, 7; 160-167
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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