Loading...
Publication
Construção e validação de um sistema de observação do guarda-redes de futebol em competição
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 4.22 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
No futebol o guarda-redes tem muita importância na equipa e no jogo, devido à sua posição
privilegiada e suas condições especiais, pelo que importa o desenvolvimento de estudos que
contribuam para a sua evolução.
Os objetivos deste trabalho foram a criação e validação de um sistema de observação de guarda redes de futebol, em competição (SOFutGRC).
A construção do sistema de observação teve por base a metodologia observacional. Após a
definição dos critérios e categorias, o sistema de observação foi validado por um grupo de
experts, chegando à versão final do SOFutGRC, com 10 critérios para observação.
O sistema de observação foi testado quanto à sua fiabilidade, através do coeficiente de K (Kappa
de Cohen). Praticamente todos os critérios obtiveram valores entre 0,8 e 1, que correspondem a
uma concordância quase perfeita.
A amostra do estudo piloto foi o guarda-redes da seleção da Bélgica, que jogou o Campeonato do
Mundo de Futebol, na Rússia, 2018.
Os resultados do estudo-piloto, mostraram um maior número de ações ofensivas (73%) do que
defensivas (27%), sendo que 10% do total de ações foram em lances de bola parada.
Ofensivamente as ações mais frequentes foram a receção/controlo de bola (19,7%), o passe
longo (18,8%) e o passe curto (13,5%), enquanto defensivamente as ações de defesa/receção
baixa, média e alta, foram as mais registadas com 4,4%, 4,1% e 7,5% respetivamente.
Verificou-se que 4,1% das ações ocorreram durante o processo defensivo e 22,3% resultaram em
transições ofensivas.
As zonas do campo onde ocorreram mais ações foram no interior da grande área (três zonas no
corredor central e entre postes, com 22,3%, 16% e 12,2%).
Na eficácia das ações ofensivas, observou-se que 37% dos passes foram completos e 16,9%
foram passes errados/incompletos. Defensivamente 5,3% das ações foram defesas incompletas.
Na forma de solicitação, as ações consequentes (ofensivas (19,7%) e defensivas (15,4%) do
próprio guarda-redes), passes de colegas de equipa (30,1%), passes errados dos adversários
(11,3%) e remates dos adversários (9,1%), foram as mais registadas.
Com a aplicação do estudo piloto verificou-se que o sistema tem validade e pode ser utilizado
para uma melhor compreensão das ações do guarda-redes em competição.
In football, the goalkeeper is very important in the team and in the game, due to his privileged position and his special conditions, which is why it is important to develop studies that contribute to his evolution. The objectives of this work were the creation and validation of a soccer goalkeeper observation system, in competition (SOFutGRC). The construction of the observation system was based on the observational methodology. After defining the criteria and categories, the observation system was validated by a group of experts, reaching the final version of SOFutGRC, with 10 criteria for observation. The observation system was tested for reliability using the coefficient of K (Cohen's Kappa). Practically all criteria obtained values between 0.8 and 1, which correspond to an almost perfect agreement. The sample of the pilot study was the goalkeeper of the Belgium national team, who played in the Football World Cup in Russia, 2018. The results of the pilot study showed a greater number of offensive actions (73%) than defensive ones (27%), with 10% of the total actions being in set pieces. Offensively, the most frequent actions were reception/ball control (19.7%), long pass (18.8%) and short pass (13.5%), while defensively, defense/reception actions were low, medium and high, were the most registered with 4.4%, 4.1% and 7.5% respectively. It was found that 4.1% of the actions occurred during the defensive process and 22.3% resulted in offensive transitions. The areas of the field where more actions took place were inside the penalty area (three zones in the central corridor and between posts, with 22.3%, 16% and 12.2%). In the effectiveness of offensive actions, it was observed that 37% of the passes were complete and 16.9% were wrong/incomplete passes. Defensively 5.3% of the actions were incomplete defenses. In the form of a request, the consequent actions (offensive (19.7%) and defensive (15.4%) of the goalkeeper himself, passes by teammates (30.1%), wrong passes by opponents (11, 3%) and shots by opponents (9.1%) were the most recorded. With the application of the pilot study, it was verified that the system is valid and can be used for a better understanding of the actions of the goalkeeper in competition.
In football, the goalkeeper is very important in the team and in the game, due to his privileged position and his special conditions, which is why it is important to develop studies that contribute to his evolution. The objectives of this work were the creation and validation of a soccer goalkeeper observation system, in competition (SOFutGRC). The construction of the observation system was based on the observational methodology. After defining the criteria and categories, the observation system was validated by a group of experts, reaching the final version of SOFutGRC, with 10 criteria for observation. The observation system was tested for reliability using the coefficient of K (Cohen's Kappa). Practically all criteria obtained values between 0.8 and 1, which correspond to an almost perfect agreement. The sample of the pilot study was the goalkeeper of the Belgium national team, who played in the Football World Cup in Russia, 2018. The results of the pilot study showed a greater number of offensive actions (73%) than defensive ones (27%), with 10% of the total actions being in set pieces. Offensively, the most frequent actions were reception/ball control (19.7%), long pass (18.8%) and short pass (13.5%), while defensively, defense/reception actions were low, medium and high, were the most registered with 4.4%, 4.1% and 7.5% respectively. It was found that 4.1% of the actions occurred during the defensive process and 22.3% resulted in offensive transitions. The areas of the field where more actions took place were inside the penalty area (three zones in the central corridor and between posts, with 22.3%, 16% and 12.2%). In the effectiveness of offensive actions, it was observed that 37% of the passes were complete and 16.9% were wrong/incomplete passes. Defensively 5.3% of the actions were incomplete defenses. In the form of a request, the consequent actions (offensive (19.7%) and defensive (15.4%) of the goalkeeper himself, passes by teammates (30.1%), wrong passes by opponents (11, 3%) and shots by opponents (9.1%) were the most recorded. With the application of the pilot study, it was verified that the system is valid and can be used for a better understanding of the actions of the goalkeeper in competition.
Description
Dissertação para obtenção do grau de mestre em Desporto - Atividades desportivas para crianças
Keywords
futebol guarda-redes sistema de observação validação ações técnicas football goalkeeper observation system validation technical actions