Papers by Claudio A Casal
Revista Andaluza de Medicina del Deporte, 2017
Palabras clave: Fútbol Saques de esquina Metodología observacional Análisis de rendimiento resume... more Palabras clave: Fútbol Saques de esquina Metodología observacional Análisis de rendimiento resumen Objetivo: Alcanzar un conocimiento más profundo (y con el soporte empírico adecuado) de los saques de esquina en el fútbol de máximo nivel. Se pretende conocer la incidencia real de este tipo de acciones durante los partidos, así como describir cuáles son las prácticas habituales. A continuación, se pretende identificar aquellas variables que puedan estar asociadas a la eficacia de estas acciones. Método: Se plantean dos tipos de aproximaciones complementarias en el análisis de los datos: una de carácter univariada, y otra bivariada. A nivel univariado se trata de describir cuáles son las características de la ejecución de estas acciones (número, forma de ejecución...). A nivel bivariado, mediante la realización de tablas de contingencia (acompañadas del contraste Chi-cuadrado y medidas de asociación) se intentará identificar aquellas variables que puedan estar asociadas a la eficacia alcanzada. Resultados: Después del registro de 345 saques de esquina ejecutados durante la Eurocopa 2012, los resultados indican una baja eficacia en el remate de este tipo de acciones. En cambio, los goles que proceden de saque de esquina sí presentan una transcendencia importante en el resultado final. Para alcanzar el éxito en este tipo de acciones, deben intervenir entre tres y cuatro atacantes y producirse una organización ofensiva dinámica. Conclusiones: Los datos empíricos disponibles han puesto en valor la necesidad de un trabajo táctico más refinado de estas acciones, basado en asociaciones entre los jugadores y movimientos de engaño.
Indirect free kicks are relatively common in soccer and have the potential to change the outcome ... more 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
El presente trabajo de investigacion consiste en un analisis predictivo de las transiciones ofens... more El presente trabajo de investigacion consiste en un analisis predictivo de las transiciones ofensivas realizadas por los mejores equipos nacionales europeos de futbol. Los principales objetivos planteados en la investigacion son determinar si es posible predecir el resultado de las secuencias ofensivas del juego, y si es asi, identificar que variables permitiran realizar dichas predicciones. Para abordar estos objetivos se ha utilizado el modelo multivariable de regresion logistica. La muestra consiste en 14 partidos, 743 transiciones ofensivas de la fase final de la Eurocopa de Austria-Suiza 2008. La utilizacion de este modelo permite concluir que es posible realizar una prediccion del resultado de las transiciones ofensivas que se suceden en el transcurso del encuentro y tambien, determinar cuales son las variables que posibilitan realizar esta prediccion. Los datos demuestran que se puede predecir el resultado final de las transiciones ofensivas en funcion de la configuracion esp...
11th World Congress of Performance Analysis of Sport, 2017
European Journal of Human Movement, Nov 15, 2021
International Journal of Environmental Research and Public Health, 2021
The use of principal component analysis (PCA) provides information about the main characteristics... more The use of principal component analysis (PCA) provides information about the main characteristics of teams, based on a set of indicators, instead of displaying individualized information for each of these indicators. In this work we have considered reducing an extensive data matrix to improve interpretation, using PCA. Subsequently, with new components and with multiple linear regression, we have carried out a comparative analysis between the best and bottom teams of LaLiga. The sample consisted of the matches corresponding to the 2015/16, 2016/17 and 2017/18 seasons. The results showed that the best teams were characterized and differentiated from bottom teams in the realization of a greater number of successful passes and in the execution of a greater number of dynamic offensive transitions. The bottom teams were characterized by executing more defensive than offensive actions, showing fewer number of goals and a greater ball possession time in the final third of the field. Goals,...
Frontiers in Psychology, 2020
The analysis of football grows exponentially, with many researchers adopting it as an object of s... more The analysis of football grows exponentially, with many researchers adopting it as an object of study. The thematic range that addresses it, as well as the different methodologies used, are of a very different nature—physical, psychological, technical, tactical—enriching every day the knowledge, and understanding of the game itself. The objective of this study has been to identify the differences between the different styles of play that lead to becoming the champion of the UEFA Champions League in the last 3 years of the pre-COVID stage, by analyzing the spatial performance developed, the association between the players that make up the different lines of the game system and the analysis of the various technical actions that are developed to carry out the offensive phase of each team. For this, the Observational Methodology and two types of analysis have been used: quantitative, by calculating X2, and qualitative, by applying the Polar Coordinates technique. The results obtained sh...
International Journal of Environmental Research and Public Health, 2021
Women’s football is a phenomenon that is experiencing an unstoppable increase in recent years. Th... more Women’s football is a phenomenon that is experiencing an unstoppable increase in recent years. The objective of this study was to analyze how ball possessions are performed in high-performance women’s football. For this, the 52 matches played by all the national teams participating in the Women’s World Cup 2015 were analyzed. A total of 3740 ball possessions were examined. Using the “move outcome” variable as a reference criterion, a statistically significant relationship was found between possessions that ended in success and possessions that have failed. Specifically, the successful possessions were those that were made in the offensive zone, with a clear intention to progress towards the rival goal, with a low number of passes, and made in the second half of the matches. The results of the logistic regression showed that the proposed model is statistically significant, with an acceptable explanatory capacity. Finally, the results of the decision tree evidence the success of those...
Journal of Human Sport and Exercise, 2020
Journal of Human Sport and Exercise, 2020
Revista Internacional de Medicina y Ciencias de la Actividad Física y del Deporte, 2018
Los autores declaran que no tienen conflictos de intereses.
International Journal of Performance Analysis in Sport, 2014
Revista Internacional de Medicina y Ciencias de la Actividad Física y del Deporte, 2019
Diseño y validación de una herramienta observacional para el bádminton (BOT) / Design and Validit... more Diseño y validación de una herramienta observacional para el bádminton (BOT) / Design and Validity of a Badminton Observation Tool (BOT).
Frontiers in Psychology, 2019
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Papers by Claudio A Casal