El estudio de las acciones ofensivas y defensivas del portero requiere especial atención para lograr identificar los indicadores de rendimiento y el éxito de la ejecución de las acciones de porteros en el fútbol. Del mismo modo, se debe poner énfasis en evidenciar parámetros acerca de la importancia del nivel del equipo sobre el éxito de las acciones del portero. El objetivo del presente trabajo es conocer las acciones ofensivas y defensivas que realizan los porteros y determinar si se presentan diferencias entre porteros de selecciones nacionales clasificados y no clasificados a la fase eliminatoria de la copa del mundo de la FIFA Rusia 2018. Se analizaron 48 partidos de la competición. Los resultaron mostraron que se realizó una mayor ejecución de acciones ofensivas (n = 2213) que defensivas (n = 1419). Los porteros de selecciones clasificadas obtuvieron valores altos en blocaje medio (M = 1,02 ±1,21), pase (M = 5,20 ±5,07) y pase con balón en movimiento (M = 2,55 ± 2,11) mientras que los porteros de selecciones no clasificadas obtuvieron valores altos en blocaje bajo (M = 2,25 ±1,78) y saque (M = 5,). Se obtuvieron diferencias significativas (p > 0,05) en las variables de reducción de espacio, balon suelto, blocaje en dos tiempos, despeje y pase. Abstract. The study of the goalkeeper's offensive and defensive actions requires special attention in order to identify performance indicators and the success of the execution of goalkeeping actions in football. In the same way, emphasis should be placed on evidencing parameters about the importance of the level of the team on the success of the goalkeeper's actions. The aim of this study is to know the offensive and defensive actions performed by goalkeepers and to determine if there are differences between goalkeepers of national teams qualified and not qualified for the knockout phase of the FIFA World Cup Russia 2018. Forty-eight matches of the competition were analysed. The results showed that more offensive (n = 2213) than defensive (n = 1419) actions were performed. Goalkeepers of ranked teams obtained high values in medium blocking (M = 1.02 ±1.21), passing (M = 5.20 ±5.07) and passing with ball in motion (M = 2.55 ± 2.11) while goalkeepers of unranked teams obtained high values in low blocking (M = 2.25 ±1.78) and serving (M = 5,). Significant differences (p > 0.05) were obtained in the variables of space reduction, loose ball, two-time blocking, clearance and passing.
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