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Wyszukujesz frazę "Michailidis, Yiannis" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Goalkeeper Performance: Analysis of Goalkeepers’ Contribution to Their Team’s Build-up under the Opponent’s Pressure in the 2018 World Cup
Autorzy:
Mikikis, Dimitrios
Michailidis, Yiannis
Mandroukas, Athanasios
Mavrommatis, George
Metaxas, Thomas
Powiązania:
https://bibliotekanauki.pl/articles/1627260.pdf
Data publikacji:
2021-09-10
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
soccer
goalkeepers
offense
build-up
passes
Opis:
The purpose of this study was to analyze in FIFA World Cup Tournament 2018 focusing on the technical and tactical offensive actions of the male goalkeepers when being under pressure and to evaluate if their actions correlated with the outcome of the match. The sample consisted of the goalkeepers (n = 41). A descriptive analysis and a hierarchical clusters analysis were performed to identify the goalkeepers’ classes. Furthermore, a factor analysis was conducted to locate the goalkeepers’ style of play and the statistical significance was set at p < 0.05. The results showed that the total percentage of correct passes under pressure was 46.5% and that the goalkeepers preferred using the air and long distance passes with one or two touches. In addition, out of the 4 groups that were formed with cluster analysis, the goalkeepers of group 2 and 3 stood out concerning the quality of their actions. The incorrect actions were correlated with defeat and the correct actions were correlated with a win (p < 0.001, r = 0.663). In conclusion, a male goalkeeper, nowadays, needs to have all the technical actions of his feet at a good level so he can contribute to his team’s build-up, especially those of distributing the ball with his feet.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2021, 34, 2; 77-86
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Beetroot Supplementation on Oxygen Muscle Saturation of Semi-Professional Soccer Players Following a Repeated Sprint Test
Autorzy:
Michailidis, Yiannis
Powiązania:
https://bibliotekanauki.pl/articles/11542039.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
nitrates
repeated sprint ability
NIRS
muscle oxygenation
Opis:
Dietary nitrates have hemodynamic and metabolic effects on the body. This study aimed to investigate nitrate intake's effect on quadricep muscle oxygen saturation (StO2) of semi-professional soccer players during a repeated speed test (RSA). In a randomized, crossover design, 10 semi-professional soccer men players (21.3 ± 0.9yrs) performed two conditions: In one they consumed a nitrate-rich concentrated beetroot juice (250 mL/150 mg of NO3−) and in the other a placebo, 2h before a repeated sprint test. StO2 of the right vastus lateralis muscle was measured by near-infrared spectroscopy. A paired samples t-test was used to compute any differences in the subjects’ performance on the StO2 and on RSA test. The level of significance was set at p < 0.05. The supplementation of nitrates limited the decrease in muscle oxygenation during the six sprints of RSA test (p < 0.001) and also, there seemed to be a tendency for limited the decrement of performance on RSA test (t = -1.586, p = 0.157, η2 = 0.218). In conclusion, acute nitrate supplementation reduces the decrement of muscle oxygenation during exercise with repeated sprints and leads to a tendency of fatigue resistance during repeated sprints under controlled situations. Nitrate supplementation may have an ergogenic effect during exercise with repeated sprints via the higher muscle oxygenation.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2023, 42; 55-63
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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