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Abstract Aim: This study investigated the adaptations of football teams as hierarchically organised open systems. In this type of system, the collective and individual behaviours are characterised by consistency and variability, respectively. Methods: Five professional men's football matches in the under-20 category were analysed. The team's centroid as a measure of the system's macrostructure and the distance from each player to the team's centroid (a measure of the system's microstructure) were obtained from the players' x and y coordinates of displacement on the soccer field. Cluster analyses were run using Ward's minimum variance method with Euclidean distance. Results: (i) teams showed consistency and variability in their macro- and microstructures, respectively; (ii) there was a correlation between attack and defence patterns in most game sequences; (iii) goals were scored when teams modified their macro and/or microstructure. Conclusion: Football teams showed correspondence in attack-defense patterns with macro-consistency and micro-variability throughout the match. Despite this, there was no relationship between the foregoing patterns and game outcomes. Goals were scored after changes in the team's structure.

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Objetivo:O presente estudo teve como objetivo analisar a produção científica sobre o goalball em língua portuguesa no cenário brasileiro. Método:Para tal, foram analisadas 38 revistas científicas da área da Educação Física e o banco de teses e dissertações da CAPES no mês de março de 2021. As buscas ocorreram com a utilização do termo "Goalball" e os critérios de inclusão para o estudo foram artigos, dissertações e teses que tiveram como objetivo analisar o goalball, sendo o período de publicação até a data de dezembro de 2020. Não foram incluídos estudos de revisão, resumos de congresso, editoriais e cartas, como também artigos ou dissertações/teses que não possuíssem o texto completodisponível ou não estivessem em língua portuguesa. Após selecionados os estudos, foram extraídos os dados referentes ao ano, periódico de publicação, instituição dos autores e categorizados conforme a temática investigada. Os dados foram analisados com base em estatística descritiva dos valores absolutos (N) e relativos (%). Resultados e discussão:No total, foram selecionados 31 estudos, sendo 15 artigos, 15 dissertações de mestrado e 1 tese de doutorado. O primeiro estudo publicado encontrado data o ano de 1999, com a maior quantidade depublicações (n = 6) verificada no ano de 2012. A análise também revelou que as temáticas mais frequentes analisadas nos estudos sobre goalball foram referentes ao treinamento, seguidas de saúde e pedagogia. Considerações Finais:Conclui-se que apesar de um leve crescimento na última década, ainda é baixo o número de estudos analisando o goalball em língua portuguesa no cenário brasileiro.

Objective:This study aimed to analysethe scientific production on goalball in Portuguese in the Brazilian scenario. Method: Thirty-eightscientific journals in the field of Physical Education and the CAPES theses and dissertations database were analysedin March 2021. The searches were carried out using the term "Goalball" and the inclusion criteria for the study were peer-reviewed articles, dissertations and theses that aimed to analysegoalball, with the publication period up to December 2020. Review studies, conference abstracts, editorials and letters were not included, as were articles or dissertations/theses that did not have the full text or were not in Portuguese. After selecting the studies, data referring to the year, journal of publication, affiliationof the authors were extracted and categorized according to the investigated theme. Data were analysedbased on descriptive statistics of absolute (N) and relative (%) values. Results and discussion: In total, 31 studies were selected, being 15 articles, 15 master's dissertations and 1 doctoral thesis. The first published study found dates to1999, with the largest number of publications (n = 6) verified in 2012. The analysis also revealed that the most frequent themes analysedin studies on goalball were related to training, followed by health and pedagogy. FinalConsiderations:Weconcluded that despite a slight growth in the last decade, the number of studies analysinggoalball in Portuguese in the Brazilian scenario is still small.

Objetivo:Este estudio tuvo como objetivo analizar la producción científica sobre goalballen portugués en el escenario brasileño. Método:Para ello, en marzo de 2021 se analizaron 38 revistas científicas del campo de la Educación Física, también comola base de datos de tesis y disertaciones CAPES. Las búsquedas se realizaron con el término "Goalball" y los criterios de inclusión para el estudio fueron artículos, disertaciones y tesis que analizaronel goalball, con el período de publicación hasta diciembre de 2020. No fueron incluidos estudios de revisión, resúmenes de congresos, editoriales y cartas, así como artículos o disertaciones / tesis que no tenían el texto completo ono estaban en portugués. Luego de seleccionar los estudios, se extrajeron los datos referentes al año, revista de publicación, institución de los autores y categorizadossegún el tema investigado. Los datos se analizaron con base en estadísticas descriptivas de valores absolutos (N) y relativos (%). Resultados y discusión:En total, fueron seleccionaron 31 estudios, siendo 15 artículos, 15 tesis de maestría y 1 tesis de doctorado. El primer estudio encontrado fue publicado den1999, con el mayor número de publicaciones (n = 6) verificadas en 2012. El análisis también reveló que los temas más frecuentes analizados en los estudios sobre goalball estaban relacionados con el entrenamiento, seguido de la salud y pedagogía. Consideraciones finales: Se concluye que,a pesar de un leve crecimiento en la última década, el número de estudios que analizan el goalball en portugués en el escenario brasileño es aún reducido.

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This study aimed to investigate why futsal players decide to dribble. For this purpose, we analysed 396 trials comprising the dribbles (n = 132), passes (n = 131) or shots (n = 133), performed by 70 male futsal players. Passing and shooting angles, and interpersonal distance, including their rates of change (velocity and variability), were regarded as measures of interpersonal coordination tendency and a comparison was made among dribbling, passing and shooting situations. In addition, the variables identified as constraints on deciding to dribble were analysed in relation to age categories, dribbling outcomes and futsal court zone. Results revealed that passing and shooting angles, and interpersonal distance showed higher variability in dribbling than in passing and shooting situations. The findings allowed us to conclude that decision-making on dribbling was influenced by the variabilities of passing angles as well as shooting and interpersonal distance, and that success in dribbling was affected by the variability of interpersonal distance. Such variabilities were interpreted concerning their meaning of risk and/or uncertainty in the execution of motor skills.

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