Análisis de los valores de eficacia de los porteros de waterpolo. (Analysis of the efficacy values in water polo goalkeepers).

El presente estudio pretende analizar los valores de eficacia de los porteros del Campeonato del Mundo de Waterpolo celebrado en Melbourne en 2007. Con la intencion de determinar si existen diferencias entre la condicion de ganador y perdedor, entre ganadores, entre perdedores y entre sexos, se filmaron y analizaron los 96 partidos celebrados, utilizando el Software Polo Analisis Directo v1.0. Se midieron diversos coeficientes de eficacia en situaciones de igualdad, desigualdad, transicion y penaltis. Se procedio con comparacion de medias U de Mann-Whitney y se encontraron diferencias entre los coeficientes de resolucion e imprecision en situacion de igualdad en funcion del sexo (U = .02; p < .05, U = .03; p < .05) y resultado (U = .0; p < .05, U = .0; p < .05), aunque no se apreciaron diferencias entre ganadores ni entre perdedores. En conclusion, se considera que los coeficientes de imprecision en transicion y penalti ofrecen una idea de la situacion deportiva a analizar y entrenar para aumentar el rendimiento deportivo, aunque aun es necesaria mayor investigacion. === The present study aims to analyze the efficacy values of goalkeepers in the Water polo World Championships held in Melbourne in 2007. In order to determine any differences between winner and loser, winners, losers and between genres, were filmed and analyzed, using the Software Pole Direct Analysis v1.0, all the 96 match celebrated. Various coefficients of effectiveness were measured in situations of equality, inequality, transition and penalties. A comparison of U Mann-Whitney was performed, and we found differences between the coefficients of resolution and imprecision in a situation of equality according to sex (U = .02; p < .05, U = .03; p < .05) and results (U = .0; p < .05, U = .0; p < .05), although there were no differences between winners, or among losers. In conclusion, it is considered that the coefficients of imprecision in transition and penalty give an idea of the sport situation to analyze and train to increase the sport performance, although still more research is necessary.