Multivariate analysis of indirect free kick in the FIFA World Cup 2014
نویسندگان
چکیده
Título: Análisis multivariante del tiro libre indirecto en la Copa del Mundo de la FIFA 2014. Resumen: Los tiros libres indirectos son situaciones que se producen con regularidad durante los partidos de fútbol, siendo acciones potencialmente trascendentales en el resultado final de los partidos. Los objetivos de este estudio fueron determinar la efectividad de estas acciones, identificar las variables asociadas con el éxito y proponer un modelo de tiro libre indirecto exitoso. Fueron codificados y analizados 506 tiros libres indirectos registrados en los 64 partidos de la FIFA World Cup Brasil 2014, se llevaron a cabo análisis univariados, bivariados (Ji-Cuadrado) y multivariados (regresión logística binaria), los resultados indican una baja eficacia en el remate, remate entre los tres palos y el gol en este tipo de acciones. En cambio, el 89% de los goles con procedencia en un tiro libre indirecto han contribuido a sumar puntos en el resultado final de los partidos. La organización ofensiva, basada en maniobras de creación y ocupación de espacios, y la intervención de hasta 4 jugadores, son variables que se han revelado como moduladoras de la eficacia. Sin duda, estos enunciados podrían suponer un punto de partida para dotar a entrenadores de nuevas herramientas tácticas con el fin de dotar de un perfil más eficaz en este tipo de acciones. Palabras clave: Regresión logística; metodología observacional; fútbol; saque de esquina. Abstract: Indirect free kicks are relatively common in soccer and have the potential to change the outcome of a match. The aim of this study was to determine the effectiveness of these kicks, to identify variables associated with success, and propose a model for optimal execution. We analyzed and coded 506 indirect free kicks taken in 64 matches during the FIFA 2014 World Cup in Brazil and conducted univariate, bivariate (chi-square), and multivariate (binary logistic regression) analyses. Our results show very low success rates in terms of shots, shots between the posts, and goals. Nevertheless, 89% of goals scored from indirect free kicks led to the teams gaining valuable points. Determinants of success included a dynamic attack based on the creation and occupation of spaces and the intervention of up to four attackers. Our findings offer an interesting starting point for trainers to build on tactical strategies designed to improve free-kick performance.
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