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Tytuł:
Effect of Variable-Intensity Running Training and Circuit Training on Selected Physiological Parameters of Soccer Players
Autorzy:
Ambroży, Tadeusz
Nowak, Mateusz
Omorczyk, Jarosław
Wrześniewski, Krzysztof
Ozimek, Mariusz
Duda, Henryk
Mucha, Dawid
Ceranowicz, Piotr
Pałka, Tomasz
Stanula, Arkadiusz
Mucha, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/1030576.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
circuit training
physiological parameters
soccer players
variable-intensity running training
Opis:
Proper planning of the training process based on individual LT and AT metabolic thresholds is essential to improve athletic performance. Development of endurance in soccer players is mainly based on continuous runs and variable-intensity runs, supplemented with strength conditioning and sport-specific training. The aim of the study was to analyse selected parameters of physical capacity of soccer players after 8-week variable-intensity running training and circuit training. The experiment was carried out in a group of 34 soccer players aged 21 to 26 years. The athletes were divided into two groups: 17 people in the experimental group and 17 people in the control group. The experimental group was involved in 30-minute tempo runs two times a week for 8 weeks with variable intensity at AT. In the same period, the control group performed two 60-minute continuous runs at the intensity of 70-75%HRmax. The determination of metabolic thresholds used two indirect tests: the multistage shuttle run test (beep test) and maximal lactate steady state test (MLSS) with author's own modification. In order to evaluate maximal heart rate (HRmax), the research procedure was started from the beep test (distance: 20 m). The speed at the first level was 8.5 km/h and increased with each level by 0.5 km/h. Training of the experimental group where variable exercise intensity was used caused a statistically significant increase in HRmax (by 1.9%) and blood lactate levels at the AT (by 20.5%). The training in the experimental group led to the statistically significant (p < 0.05) increase in the parameters of the following variables: HRmax (by 1.9%); lactate level (by 7.85); HR at the AT (by 1,9%); lactate level at the AT (by 20.5%). The assumptions of the experimental training did not cause statistically significant changes in pretest vs. posttest HRmax and blood lactate levels for the LT. Endurance training with high intensity is more effective in soccer players compared to training with moderate intensity. Development of special endurance in soccer should also assume the intensity and method of working similar to the method used during sport competition.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2018, 23, 3; 25-35
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Risks of Social Noise Exposure in the Vulnerable Population in Slovakia
Autorzy:
Argalasova, L.
Filova, A.
Hirosova, K.
Vondrova, D.
Samohyl, M.
Krajcova, D.
Jurkovicova, J.
Sevcikova, L.
Powiązania:
https://bibliotekanauki.pl/articles/176401.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
social noise exposure
road traffic noise
personal music players
university students
Opis:
The study is aimed to quantify the effects of social noise exposure (personal music players (PMP), events with high noise exposure) and the exposure to the other environmental noise sources in the selected sample of Slovak university students. The validated ICBEN methodology was used to assess noise annoyance. The measurement of ambient noise levels was done using hand-held sound level analyzer. There were 526 university students (143 males and 383 females, average age 23 ± 2.2) enrolled into the study so far, 192 in the exposed housing facility to road traffic noise and 326 in the control housing facility in Bratislava. The social noise exposure was quantified and followed according to the authorized methodology of the study Ohrkan. From the total sample 416 (79.4%) students reported the use of PMP in the last week for the average time of 314 minutes. There was a significant difference in PMP use between the exposed (85.34%) and the control group (76.31%) (p = 0:01). Among PMP users 28.1% exceeded the LAV (lower action value for industry = 80 dB). The results showed the importance of road traffic and the social noise as well and the need for prevention and intervention in these vulnerable groups.
Źródło:
Archives of Acoustics; 2016, 41, 3; 535-541
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kobiety w szachach. Problemy związane z rodziną w procesie rozwoju talentu
Women in Chess. Family-Related Problems in the Process of Talent Development
Autorzy:
Baum, Alicja
Powiązania:
https://bibliotekanauki.pl/articles/30148761.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
problemy rodzinne
proces rozwoju talentu
szachistki
arcymistrzynie szachowe
family problems
talent development process
female chess players
female chess grandmasters
Opis:
Celem analiz zaprezentowanych w artykule było poznanie problemów związanych z rodziną pochodzenia, z jakimi zmagały się polskie arcymistrzynie szachowe podczas procesu rozwoju talentu, czyli czasu dochodzenia do najwyższego szachowego tytułu kobiecego. W badaniach zastosowano metodę wywiadu swobodnego pogłębionego, jakościowego. Narzędzie badań stanowił przewodnik przygotowany w oparciu o Zintegrowany Model Rozwoju Talentu (CMTD) Françoys Gagnégo. Wypowiedzi 14 badanych arcymistrzyń szachowych poddano analizie jakościowej, która wykazała, że niemal wszystkie przyszłe arcymistrzynie doświadczały trudności związanych z rodziną pochodzenia. Ustalono ich dwojaki rodzaj: ogólny, wynikający z kondycji rodziny, wyznawanych wartości czy postaw (problemy finansowe i organizacyjne, niezgodność postaw rodziców wobec uprawiania szachów i brak wsparcia jednego z rodziców, poczucie „grania dla ojca”, niesprzyjająca atmosfera w domu), oraz odnoszący się do szachów jako dyscypliny sportu (presja na wynik, przymus trenowania, przymus pracy z określonym trenerem, niezrozumienie aspektów sportu).
The goal of the analyses presented in the article was to discover the issues connected to the family of origin, which the Polish female chess grandmasters were dealing with during the process of talent development, meaning the time they were achieving the highest female chess title. The method used in the research were in-depth, unstructured, qualitative interviews. The research tool guide was prepared on the basis of Françoys Gagné’s Comprehensive Model of Talent Development (CMTD). The statements of the 14 researched female chess grandmasters underwent qualitative analysis, which demonstrated that nearly all of them experienced difficulties related with their families of origin. Two types of problems were identified: general, resulting from the condition of the family, professed values, or attitudes (financial and time-related family problems, parents’ incompatible attitudes towards practicing chess, lack of support from one of the parents, a sense of “playing for the father,” general unfavorable household atmosphere), as well as those relating to chess as a sport (pressure for good results, obligation to train, and practicing with a specific coach, not understanding sport-related aspects).
Źródło:
Nauki o Wychowaniu. Studia Interdyscyplinarne; 2023, 16, 1; 126-143
2450-4491
Pojawia się w:
Nauki o Wychowaniu. Studia Interdyscyplinarne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Leg strength and power in Polish striker soccer players
Autorzy:
Buśko, K.
Górski, M.
Nikolaidis, P. T.
Mazur-Różycka, J.
Łach, P.
Staniak, Z.
Gajewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/307478.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
izokinetyka
moment siły
moc
force sense
height of jump
isokinetic
peak torque
power
striker soccer players
Opis:
The main goal of the present study was to examine muscle strength and power of dominant and non-dominant leg, knee extensors and flexors, and their correlations with jumping performances in soccer players. A secondary aim was to evaluate muscle sense. Methods: 31 male professional strikers (age 20.9 ± 2.3 years, body mass 75.1 ± 6.6 kg, body height 179.5 ± 4.7 cm) participated in the study. The power output of lower extremities and the height of rise of the body mass centre during vertical jumps were measured using a force plate. The maximum muscle torque of the flexors and extensors of the knee were measured under isometric conditions using a special isometric torquemeter. Force sense was measured in isometric conditions in two tests: (a) fifty percent of the maximal voluntary contraction was set as a value of target force and the participants were instructed to reproduce the target force, (b) the participants attempted to develop a torque reproducing a sine course within the range of 10 to 50% of MVC performed. Results: A direct relationship was observed between the peak muscle torque in knee extensors developed during isokinetic contraction at all velocities and power and height of three types of vertical jumps ( p < 0.05). No correlation was observed between jumping performance and muscle torque under isometric condition. No differences were found in strength and jumping abilities as well as in force sense between dominant and non-dominant legs. Conclusions: This study offered a comprehensive and complete evaluation of leg muscle strength, sense and power, with the use of using force plate and isokinetic dynamometry.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 2; 109-116
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Somatotype : variables related to muscle torque and power output in female volleyball players
Autorzy:
Buśko, K.
Lewandowska, J.
Lipińska, M.
Michalski, R.
Pastuszak, A.
Powiązania:
https://bibliotekanauki.pl/articles/307269.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
female
volleyball players
somatotype
strength
power
jump
wytrzymałość
energia
skok
Opis:
The purpose of this study was to investigate the relationship between somatotype, muscle torque, maximal power output and height of rise of the body mass centre measured in akimbo counter movement jump (ACMJ), counter movement jump (CMJ) and spike jump (SPJ), and power output measured in maximal cycle ergometer exercise bouts in female volleyball players. Fourteen players participated in the study. Somatotype was determined using the Heath–Carter method. Maximal muscle torque was measured under static conditions. Power output was measured in 5 maximal cycle ergometer exercise bouts, 10 s each, at increasing external loads equal to 2.5, 5.0, 7.5, 10.0 and 12.5% of body weight (BW). All jump trials (ACMJ, SPJ and CMJ) were performed on a force plate. The mean somatotype of volleyball players was: 4.9-3.5-2.5. The value of the sum of muscle torque of the left upper extremities was significantly correlated only with mesomorphic component. Mesomorphic and ectomorphic components correlated significantly with values of maximal power measured during ACMJ and CMJ. Power output measured in maximal cycle ergometer exercise bouts at increasing external loads equal to 2.5, 5.0 and 7.5% of BW was significantly correlated with endomorphy, mesomorphy and ectomorphy.
Źródło:
Acta of Bioengineering and Biomechanics; 2013, 15, 2; 119-126
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abstrakcyjna kontrola konstytucyjności – 25 lat doświadczeń Najwyższego Sądu Federacji Brazylii
Autorzy:
de Limas Tomio, Fabricio Ricardo
Robl Filho, Ilton Norberto
Powiązania:
https://bibliotekanauki.pl/articles/524535.pdf
Data publikacji:
2014-10-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Brazylijski Federalny Sąd Najwyższy (STF)
kontrola sądowa
podmioty polityczne
Brazilian Supreme Federal Court (STF)
judicial review
institutional/collective veto players
Opis:
Artykuł podejmuje temat scentralizowanej i abstrakcyjnej kontroli konstytucyjności dokonywanej przez Federalny Sąd Najwyższy Brazylii oraz metody i teoretyczne podejścia w zakresie empirycznych badań procesu podejmowania decyzji i interpretacji prawa. Artykuł obejmuje swoim zakresem badanie 5011 decyzji Sądu podjętych w latach 1988–2013, przyjmując cztery wzajemnie się wykluczające hipotezy: H1) Sąd w procesie podejmowa-nia decyzji o niekonstytucyjności przyjmuje rolę veto player (podmiotu, bez którego zgody nie można dokonać zmiany status quo), zwiększając polityczną stabilność poprzez redukowanie znaczenia wyboru większości i eksponowanie istoty jednomyślności, H2) sąd konstytucyjny nie jest podmiotem o randze veto player, ponieważ instytucjonalnie proces powoływania sędziów sądu wskazuje na absorbowanie przez sąd roli innych veto players w procesie kontroli, a w konsekwencji: H3) liczba podmiotów uprawnionych do wszczynania postępowania przed sądem wpływa na zwiększenie stabilności prowadzonej polityki i redukuje znaczenie obranych celów polityki rządzącej większości oraz H4) liczba tych podmiotów wyznacza wzrost stabilizacji polityki stanów w federacji i pozostaje bez szkody dla polityki federalnej. W konkluzji, będącej efektem rozległych badań empirycznych, autorzy znajdują potwierdzenie hipotezy pierwszej (H1) w procesie podejmowania decyzji na poziomie stanowym i nieco mniej na poziomie federalnym, odrzucając częściowo hipotezę drugą (H2). Wskazują także, badając strukturę podmiotów składających wnioski do sądu o badanie konstytucyjności, że sądowa kontrola jest używana przez mniejszości w celu wskazania swojej politycznej pozycji i zwiększenia szans na sukces wyborczy w przyszłości (H3). Sądowa kontrola jest skierowana na wzrost stabilności polityki stanów, redukując rolę większości w decentralizacji władzy państwa federacyjnego (H4).
This paper analyzes judicial review (concentrated and abstract) exercised by the Brazilian Federal Supreme Court (STF) and the methods for and theories that allow an empirical approach to this phenomenon as a decision-making process, making use of political institutions (distribution of powers and competences) and legal interpretation (legal literature and concepts). The institutional context of the decision-making process assigned by the Brazilian Constitution to the Federal Supreme Court (STF) makes it act by means of concentrated judicial review, ascribing to it the power to judge the constitutionality of federal and state law or normative acts, judicially reviewing these norms. The objective of this study is to determine the role of judicial review and the extent of concentrated judicial review, using as empirical basis the decisions of the Supreme Court in 5011 Direct Actions of Unconstitutionality (ADIs), adjudicated between 1988 and 2013. In the empirical test, there are the following main and mutually exclusive hypotheses: H1- Judicial review adds an institutional collective veto player in decision-making (institutional analysis), increasing policy stability while reducing size the winning set of the status quo or expanding the core of unanimity; H2- Judicial review does not add an institutional/collective veto player, because, institutionally, the constitutional design and the process of appointment of the members of STF indicates the validity of the absorption rule of the Court in concentrated judicial review by other veto players. Secondly, there are the following hypotheses: H3 – The number of legitimized plaintiffs for the petition of judicial review cases (ADI) increases policy stability and reduces importance of agenda setting and decision-making capacity of majority coalitions in decision making; H4 – The number of legitimate plaintiffs for the petition of judicializing measures increases the state/federative policy stability and is innocuous to federal policy stability and decision-making. Conclusions: The data demonstrates that H1 is supported in federative/state decision-making and little evident national level, partially refuting H2. However, given the number of legitimized plaintiffs, the massive introduction of judicializing measures at the national level indicates that judicial review is used by minorities as signaling for political positioning and maximizing future electoral opportunities without effectively restricting government (H3). Judicial review is directed preferentially to increase federative/state policy stability, reducing the role of opposition majorities or restricting decisions to extend the federal decentralization by state decision making (H4).
Źródło:
Przegląd Prawa Konstytucyjnego; 2014, 5 (21); 11-37
2082-1212
Pojawia się w:
Przegląd Prawa Konstytucyjnego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sprawność działań ofensywnych zawodników o najwyższych kompetencjach sportowych
Efficiency of offensive actions of highly proficient footballers
Autorzy:
Dolański, Bartosz
Powiązania:
https://bibliotekanauki.pl/articles/464982.pdf
Data publikacji:
2013
Wydawca:
Akademia Wychowania Fizycznego we Wrocławiu
Tematy:
football players
efficiency of actions
observation of games
piłkarze
skuteczność działania
obserwacja gry
Opis:
Background. The aim of this paper was to create cognitive models reflecting the efficiency of actions of players in individual positions existing in a modern system of play organization on the basis of a praxeological theory of team sport games. Furthermore, an attempt was made to determine the efficiency of individual and team actions of the studied teams according to the current player’s position. Material and methods. The research material consisted of 21 semi-final and final matches played during the most important football tournaments in the years 2002–2008. Actions of 26 teams playing in the 1–4–2–3–1 system of play organization were analysed. Results. It was found that the efficiency of actions of individual footballers playing according to a certain system of play organization is dependent on the position in the formation. Conclusions. Patterns of efficiency of actions of footballers playing in particular positions should be used to create models of play for lower level players.
Źródło:
Rozprawy Naukowe Akademii Wychowania Fizycznego we Wrocławiu; 2013, 42; 20-28
0239-4375
Pojawia się w:
Rozprawy Naukowe Akademii Wychowania Fizycznego we Wrocławiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effects of Small-Sided Games on Fitness Components and Technical Abilities among Youth Soccer Players
Autorzy:
Faridz Ahmad, Mohd
Fook Lee Low, Jeffrey
MD Nadzalan, Ali
Powiązania:
https://bibliotekanauki.pl/articles/32479028.pdf
Data publikacji:
2024
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
small-sided games (SSG)
fitness components
technical abilities
youth soccer players
Opis:
Small-sided games (SSG) is one of the increasingly popular training method in developing fitness components and technical abilities among soccer players. The objective of this study was to investigate the effectiveness of SSG training towards player’s fitness components and technical abilities after six weeks of training program among youth soccer players. Sixty youth soccer players (M = 19.98 years of age; SD = 0.97) were recruited in this study and were divided into SSG intervention group (IG, N = 30) and control group (CG, N = 30). Agility, speed, cardiovascular endurance, passing and dribbling tests were conducted pre- and post- six weeks of training. Results showed that there was a statistically significant difference on speed, passing, dribbling and VO2max in the post-test among the IG group. When compared to CG, IG were shown to perform better at speed, dribbling and VO2max as it showed a significant difference between groups. As a conclusion, SSG training method can improve speed, passing, dribbling and VO2max. Therefore, this study recommends SSG training to be apply towards youth soccer players.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2024, 45; 83-93
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gender differences and relationships between upper extremity muscle strength, lower limb power and shuttle velocity in forehand smash and jump smash in badminton
Autorzy:
Ferreira, Anna
Górski, Michał
Gajewski, Jan
Powiązania:
https://bibliotekanauki.pl/articles/27324102.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biomechanics
shuttlecock speed
technique
badminton players
performance
biomechanika
prędkość lotki
technika
gracze w badmintona
wydajność
Opis:
The aim of the study was to investigate the relationships between shuttlecock velocity during a badminton forehand smash with and without jump (VmaxWJ and VmaxNJ), strength of upper limb muscles, vertical jump height and to analyze differences in these parameters for each gender. Methods: The study examined members of the Polish National Badminton Team seven women and seven men. A special torque meter was used to assess the strength of the upper limb muscles. Vertical jumps were performed on an AMTI force plate. Shuttlecock velocity was measured using Vicon motion capture system. Results: Differences between the right and left limbs were observed in all muscle groups except shoulder flexion for both genders. The results of all measured parameters: torques, height of countermovement and spike jump (HACMJ, HCMJ, HSPJ), VmaxWJ and VmaxNJ, were greater for men than for women. No statistically significant differences were found between VmaxWJ (men: 83.27 ± 4.83 m/s; women: 67.57 ± 4.21 m/s) and VmaxNJ (men: 84.19 ± 6.05 m/s; women: 69.70 ± 6.53 m/s) within the same gender. Positive correlations were found between both HCMJ and HSPJ regarding VmaxWJ in men; the height of shuttlecock impact in jump smash (HWJ) and HSPJ in women; proving the importance of jumping ability in badminton. Negative correlations were found between HWJ and VmaxWJ for both genders. Conclusions: The jump before smash is not used in order to hit the shuttle from the highest point, but to gain time to correctly prepare the phase of stroke while being in the air.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 4; 41--49
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Między starą a nową ojczyzną – muzyczna aktywność cymbalistów na Dolnym Śląsku w latach 50. XX wieku
Between the Old and the New Homeland: Dulcimer Players Musical Activity in Lower Silesia in the 1950s
Autorzy:
Gacek, Gabriela
Powiązania:
https://bibliotekanauki.pl/articles/31341655.pdf
Data publikacji:
2022
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
cymbaliści
Dolny Śląsk
kresy wschodnie
migracja
nagrania archiwalne
dulcimer players
Lower Silesia
eastern borderlands
migration
archival recordings
Opis:
W artykule omówiono zagadnienie muzycznej aktywności cymbalistów, którzy zmuszeni byli do migracji z przedwojennych kresów wschodnich (Wileńszczyzny, Galicji Wschodniej) na Dolny Śląsk po II wojnie światowej. Będąc nowymi osadnikami na tzw. Ziemiach Odzyskanych, otoczeni ludnością o różnym pochodzeniu regionalnym, cymbaliści próbowali w nowych warunkach kontynuować muzyczną działalność. W tekście ukazane są różne sposoby adaptacji do nowej sytuacji wykonawczej w nowym miejscu zamieszkania: budowanie kolejnych instrumentów, granie w kapelach ludowych składających się z członków o różnym pochodzeniu regionalnym, próby indywidualnego muzykowania oparte na wykonywaniu muzyki tanecznej z regionu pochodzenia czy założenie zespołu składającego się z uczniów szkoły średniej uczących się wykonywać aranżację melodii pieśni ludowej z Dolnego Śląska i repertuar z Wileńszczyzny. Za bazę źródłową służą archiwalne przykłady muzyczne nagrane w latach 50. XX wieku przez Józefa Majchrzaka (1909-1985), polskiego folklorystę, muzykologa i redaktora radiowego pracującego w Polskim Radiu Wrocław.
In this article, I would like to describe the musical activity of the dulcimer players who moved to Lower Silesia after World War II as a result of being expelled from the pre-war Polish eastern borderlands: the Vilnius region and East Galicia. Being new settlers in the so called Recovered Territories, surrounded by people who came both from their native and other regions, dulcimer players tried to continue their musical activity. I examine their different ways of adapting to a new situation and new place of residence, by building new dulcimers, joining interregional folk bands, attempting individual music-making based on the performance of dance music from their own region, or establishing an ensemble consisting of high school students. In my article, I draw on examples from archival recordings from the 1950s made by Józef Majchrzak (1909-1985), the Polish folklorist, musicologist and radio editor who worked for Polish Radio Wrocław.
Źródło:
Roczniki Humanistyczne; 2022, 70, 12; 169-185
0035-7707
Pojawia się w:
Roczniki Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anaerobic performance in 30s Wingate test as one of the possible criteria for selection Czech hockey players into National Hockey League
Autorzy:
Heller, Jan
Vodicka, Pavel
Janek, Michael
Powiązania:
https://bibliotekanauki.pl/articles/1921992.pdf
Data publikacji:
2019-03-20
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
anaerobic capacity
anaerobic power
National Hockey League
professional ice hockey players
Wingate test
Opis:
The selection into the National Hockey League (NHL) is based on criteria reflecting job analysis of a professional ice hockey player and the requirements of the game. Only few Czech elite ice hockey players succeed to participate in NHL and their number is decreasing in the last decade. Aim of Study: The aim of the study was to find out and evaluate the level of anaerobic readiness of Czech hockey forwards and defenders playing in the NHL and to compare their anaerobic performance with that in elite national hockey players from the Czech extra-league. Material and Methods: Results of 30s Wingate anaerobic test obtained in 26 forwards and 16 defenders, Czech hockey players from the NHL (from 2001/2002 to 2015/2016 seasons) were compared with the reference values of elite Czech ice hockey players. The comparison was based on the mean values, rate of dispersion, and effect sizes were calculated using Cohen's d coefficient. Results: In forwards, both absolute and relative values of peak power (PP) and anaerobic capacity (AnC) found in Czech players in NHL were higher (d>1) than in elite Czech national players. In defenders, only the value of AnC relative to body mass showed small effect (d=0.36), but absolute and relative values of PP and absolute value of AnC were higher (d>1) than in elite Czech national players. Conclusion: The results of the study indicate that anaerobic readiness evaluated by 30s Wingate test may be, besides dominant on-ice skills, one of the criteria for entry to the top ice hockey competition.
Źródło:
Physical Activity Review; 2019, 7; 57-62
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Symmetry of proprioceptive sense in female soccer players
Autorzy:
Iwańska, D.
Karczewska, M.
Madej, A.
Urbanik, Cz.
Powiązania:
https://bibliotekanauki.pl/articles/306363.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
propriocepcja
symetria
kobieta
piłkarze nożni
proprioception
symmetry
female
soccer players
Opis:
Purpose: The purpose of the study was to assess the symmetry of proprioceptive sense among female soccer players when trying to reproduce isometric knee extensions (right and left) and to analyze the impact of a given level of muscle force on proprioception. Methods: The study involved 12 soccer players aged 19.5 ± 2.65 years. Soccer players performed a control measurement of a maximum 3s (knee at the 90°) position in the joint. Subsequently, 70%, 50%, and 30% of the maximum voluntary contraction (MVC) were all calculated and then reproduced by each subject with feedback. Next, the players reproduced the predefined muscle contraction values in three sequences: A – 50%, 70%, 30%; B – 50%, 30%, 70%; C – 70%, 30%, 50% of MVC without visual control. Results: In every sequence, the participants found obtaining the value of 30% of MVC the most difficult. The value they reproduced most accurately was 70% of MVC. Both trial II and trial III demonstrated that the symmetry index SI significantly differed from values considered acceptable (SIRa). In each successive sequence the largest asymmetry occurred while reproducing the lowest values of MVC (30%) (p < 0.05). Conclusion: High level of prioprioceptive sense is important to soccer players due to the extensive overload associated with dynamics stops or changes in direction while running. Special attention should be paid to develop skills in sensing force of varying levels. It was much harder to reproduce the predefined values if there was no feedback.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 2; 155-163
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new hand dynamometer activforce isometric muscle activation on single joint muscle force of volleyball players
Autorzy:
Kahraman, Yeliz
Powiązania:
https://bibliotekanauki.pl/articles/34671012.pdf
Data publikacji:
2024-02-23
Wydawca:
Akademia Tarnowska
Tematy:
isometric force
peak
average
volleyball players
Opis:
Isometric muscle activation of single joint to volleyball players is critic on sport performance to produce potential muscle force, however isometric measurement limited in isokinetic muscle activity measurement of volleyball players. Indeed, hand dynamometers commonly use in various body isometric force. Professional volleyball players age 16.23 ± 0.59 yr, body mass 60.22 ± 4.64 kg, hight 1.69 ± 0.04 m participated to peak and average isometric force measurement over 8 week pre and post test. Accordingly, single joint muscle force production measurement of volleyball players tested on isometric muscle activation using a new hand dynamometer activforce 2. Isometric muscle activation tests consisted of 24 body region from upper and lower compartment. For this isometric muscle action test detected on peak force outcomes (SEM: 37.90; CV: 1.79) and average force outcomes (SEM: 33.62; CV: 1.84). The high isometric muscle action joint loading performing mechanical test application recommended on athletic population to using isometric potential high contraction model by strength training performance separately in-season and off-season measurement modeling. Conclusion, peak and average force production progressive isometric modeling of volleyball athletes worked to current sport–health condition. As out, conclusion must be advanced isometric force measurement proper work in sport-specific tasks. The proper isometric force must be repeat sport performance outcome in different sport modalities.
Źródło:
Health Promotion & Physical Activity; 2023, 25, 4; 22-30
2544-9117
Pojawia się w:
Health Promotion & Physical Activity
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elimination of dominated strategies and inessential players
Autorzy:
Kaneko, M.
Liu, S.
Powiązania:
https://bibliotekanauki.pl/articles/406320.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
dominated strategies
inessential players
iterated elimination
order-independence
estimation of initial games
Opis:
We study the process, called the IEDI process, of iterated elimination of (strictly) dominated strategies and inessential players for finite strategic games. Such elimination may reduce the size of a game considerably, for example, from a game with a large number of players to one with a few players. We extend two existing results to our context; the preservation of Nash equilibria and orderindependence. These give a way of computing the set of Nash equilibria for an initial situation from the endgame. Then, we reverse our perspective to ask the question of what initial situations end up at a given final game. We assess what situations underlie an endgame. We give conditions for the pattern of player sets required for a resulting sequence of the IEDI process to an endgame. We illustrate our development with a few extensions of the battle of the sexes.
Źródło:
Operations Research and Decisions; 2015, 25, 1; 33-54
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolutionary stable strategies in networked games: the influence of topology
Autorzy:
Kasthurirathna, D.
Piraveenan, M.
Uddin, S.
Powiązania:
https://bibliotekanauki.pl/articles/91531.pdf
Data publikacji:
2015
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
evolutionary game theory
competing strategy
evolutionary stability
network topology
Zero-determinant strategy
Pavlov strategy
players population
topological stability
cooperator strategy
ewolucyjna teoria gier
strategia współzawodnictwa
stabilność ewolucyjna
topologia sieci
strategia Pavlova
populacja graczy
stabilność topologiczna
strategia współpracy
Opis:
Evolutionary game theory is used to model the evolution of competing strategies in a population of players. Evolutionary stability of a strategy is a dynamic equilibrium, in which any competing mutated strategy would be wiped out from a population. If a strategy is weak evolutionarily stable, the competing strategy may manage to survive within the network. Understanding the network-related factors that affect the evolutionary stability of a strategy would be critical in making accurate predictions about the behaviour of a strategy in a real-world strategic decision making environment. In this work, we evaluate the effect of network topology on the evolutionary stability of a strategy. We focus on two well-known strategies known as the Zero-determinant strategy and the Pavlov strategy. Zero-determinant strategies have been shown to be evolutionarily unstable in a well-mixed population of players. We identify that the Zero-determinant strategy may survive, and may even dominate in a population of players connected through a non-homogeneous network. We introduce the concept of ‘topological stability’ to denote this phenomenon. We argue that not only the network topology, but also the evolutionary process applied and the initial distribution of strategies are critical in determining the evolutionary stability of strategies. Further, we observe that topological stability could affect other well-known strategies as well, such as the general cooperator strategy and the cooperator strategy. Our observations suggest that the variation of evolutionary stability due to topological stability of strategies may be more prevalent in the social context of strategic evolution, in comparison to the biological context.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2015, 5, 2; 83-95
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
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