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Impacto da tomada de decisão do guarda-redes de futebol na cinemática da impulsão em guarda-redes de elite
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O objetivo deste estudo passa por analisar a tomada de decisão do guarda-redes no remate de futebol, onde foram analisadas algumas variáveis cinemáticas e onde foi usado um sistema de digitalização manual. Após todo o tratamento dos dados, o objetivo do trabalho passou por analisar a decisão tomada pelo guarda-redes tendo em conta a direção e altura da bola. O guarda-rede estavam posicionados no centro da linha de baliza e onde foi lançada uma bola para cada uma das quatro zonas previamente definidas. O guarda-redes não sabia para qual das zonas iria ser lançada a bola apesar de terem pistas através da máquina que as lançava. Através da análise com o sistema APAS, foi possível analisar a velocidade do centro de massa, o tempo de reação motor, as variações angulares da articulação do tornozelo, joelho e anca, a altura do centro de massa, a velocidade horizontal e vertical e o tempo total da defesa, para no fim perceber se havia diferenças para o lado que a bola era lançada.
The aim of this study concerned the analysis of the decision-making of the goalkeeper in shots on goal in football. Several cinematic variables were considered using a manual digitisation system. After data processing and analysis, the goal of the study translated into the analysis of decision-making of the goalkeeper considering the direction and height of the football. The goalkeeper was positioned at the middle of the goal line, and a football was shot in the direction of each one of four previously defined areas of the goal. The goalkeeper was not aware of which area the football was going to be shot at, although there were some hints owing to the machine in charge of shooting the balls. Through an analysis with APAS system, it was possible to analyse the velocity of the centre of mass, the motor time of reaction, the angular variations in the joints of the ankle, knee and hip, the height of the centre of mass, the horizontal and vertical velocities, and the total time of defence. These variables permitted the assessment of differences depending on which area of the goal the football is being shot at.
The aim of this study concerned the analysis of the decision-making of the goalkeeper in shots on goal in football. Several cinematic variables were considered using a manual digitisation system. After data processing and analysis, the goal of the study translated into the analysis of decision-making of the goalkeeper considering the direction and height of the football. The goalkeeper was positioned at the middle of the goal line, and a football was shot in the direction of each one of four previously defined areas of the goal. The goalkeeper was not aware of which area the football was going to be shot at, although there were some hints owing to the machine in charge of shooting the balls. Through an analysis with APAS system, it was possible to analyse the velocity of the centre of mass, the motor time of reaction, the angular variations in the joints of the ankle, knee and hip, the height of the centre of mass, the horizontal and vertical velocities, and the total time of defence. These variables permitted the assessment of differences depending on which area of the goal the football is being shot at.
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Futebol Guarda-redes Tomada de decisão Digitalização Marcadores Queda Direção da bola Altura da bola Biomecânica Desempenho Football Goalkeeper Decision-making Digitalisation Markers Fall Football direction Football height Biomechanics Performance