标题：Análisis de la influencia del líbero en diferentes fases del juego en voleibol / Analysis of the Influence of the Líbero in Different Phases of Game in Volleyball
其他标题：Analysis of the Influence of the Líbero in Different Phases of Game in Volleyball
期刊名称：Revista international de medicina y ciencias de la actividad fisica y del deporte
印刷版ISSN：1577-0354
出版年度：2015
卷号：60
期号：2015
页码：739-756
DOI：10.15366/rimcafd2015.60.008
出版社：CV Ciencias del Deporte RedIRIS
摘要：El objetivo del estudio fue analizar la participación y la influencia del jugador líbero en la fase de ataque y en la fase de defensa en voleibol masculino de alto nivel. La muestra de estudio estuvo compuesta por 1101 acciones de juego de recepción y defensa, de los cuatro equipos masculinos mejor clasificados en los JJOO de Pekin 2008. Las variables consideradas en el estudio fueron: clasificación del equipo, jugador receptor/defensa, zona de recepción/defensa, eficacia de recepción/defensa, eficacia de la colocación, zona de ataque/contraataque, tiempo de ataque/contraataque, eficacia de ataque/contraataque. La medida de dichas variables se realizó mediante la observación sistemática, indirecta y externa. Se recurrió a la estadística descriptiva y, posteriormente, se utilizaron técnicas de estadística inferencial, basada en tablas de contingencia, valores de Chi-cuadrado y V de Cramer. Los resultados mostraron que, en la fase de defensa, hubo asociaciones significativas entre: el jugador que defiende y la zona de defensa, predominando la defensa del líbero en zona 5; el jugador que defiende y la eficacia de la defensa, siendo mejorada por parte del líbero; el jugador que defiende y la zona de contraataque, incrementándose los ataques por zona 6 cuando defiende el líbero. PALABRAS CLAVES: análisis del juego, alto nivel, líbero, voleibol. ABSTRACT The aim of the study was to analyse the libero’s participation and their influence in the attack and defence phases in men's elite volleyball. The sample of this study was composed by 1101 pass and defence game actions of the four highest-placed teams in the 2008 Beijing Olympic Games. The study’s variables include team classification, receiving/defending player, pass/defence zone, pass/defence effectiveness, setting effectiveness, attack/counterattack zone, attack/counterattack time, and attack/counterattack effectiveness. These variables were measured by both indirect and external systematic observation. A descriptive statistical study was used, followed by inferential statistical techniques based on contingency tables, Chi-square tests, and Cramer's V values. The results revealed that there were significant associations during the defensive stage of the game between the defending player and the defensive phase, the libero’s defence predominating in zone 5; the defending player and defence efficiency, which is improved by the libero; the defending player and counterattack, as attacks increased in zone 6 when the libero was defending. KEY WORDS: game analysis, high level, libero, volleyball.
其他摘要：The aim of the study was to analyse the libero’s participation and their influence in the attack and defence phases in men's elite volleyball. The sample of this study was composed by 1101 pass and defence game actions of the four highest-placed teams in the 2008 Beijing Olympic Games. The study’s variables include team classification, receiving/defending player, pass/defence zone, pass/defence effectiveness, setting effectiveness, attack/counterattack zone, attack/counterattack time, and attack/counterattack effectiveness. These variables were measured by both indirect and external systematic observation. A descriptive statistical study was used, followed by inferential statistical techniques based on contingency tables, Chi-square tests, and Cramer's V values. The results revealed that there were significant associations during the defensive stage of the game between the defending player and the defensive phase, the libero’s defence predominating in zone 5; the defending player and defence efficiency, which is improved by the libero; the defending player and counterattack, as attacks increased in zone 6 when the libero was defending.
关键词：S análisis del juego; alto nivel; líbero; voleibol.
其他关键词：game analysis, high level, libero, volleyball.
