Leg dominance and performance in change of directions tests in young soccer players

The present study aimed to examine the influence of leg dominance on the change of direction (COD) performance. In this study participated 94 healthy young highly trained male soccer players belonging from two categories (n = 27 vs. n = 67; 14.81 ± 0.40 vs. 16.64 ± 1.25 years of age; 170.61 ± 5.61 vs. 173.73 ± 7.19 cm of height; 64.74 ± 8.44 vs. 66.70 ± 7.95 kg of weight, for U16 and U18, respectively). Fitness assessments were performed two times in a period of three months, and included: (1) anthropometry measures, (2) 30–15 IFT, (3) 10-m sprint test, (4) 505-COD test, 90° COD test and cross-over hop test. A paired sample t-test was performed to evaluate the asymmetries at the intragroup level in each of the COD’s tests. A symmetry index was used to analyse the asymmetries between categories, and an independent sample t-test was used to compare the variability between the two categories in each of the three tests performed. The effect size was also evaluated. Analysis demonstrated that evidence a trend for a better performance with the preferred leg in the cross-over hop and 505-COD tests, and with the non-dominant leg in the 90° COD. However, in the intragroup analysis, only the 505-COD test registered differences, and no differences were notice din the intergroup comparison. Only in the 505-COD test the percentage of variability (CV) was statistically significant (7.03 ± 4.18% vs. 4.03 ± 2.02% from U16 and U18, respectively). In sum, bilateral differences were noticed in the intragroup comparison, although only in 505-COD test the leg dominance showed to influence performance. In the intergroup analysis any difference was noticed between age categories

Princípios Pedagógicos dos Teaching Games for Understanding e da Pedagogia Não-Linear no Ensino da Educação Física

The ecological teaching models of Physical Education distinguished by their student-centered teaching. Specifically, the Teaching Games for Understanding and the Nonlinear Pedagogy are models that allow a learning process based on the intrinsic dynamics of sports games, distinguished for their relevance to the development of students' declarative and procedural tactical knowledge. However, as recent models, need to be properly understood and geared towards to the efficient didactic intervention. Therefore, the main objective of this paper is to develop the pedagogical principles that underlie the models: i) sampling; ii) representation; iii) exaggeration; and iv) tactical complexity. In summary, will described the essential pedagogical principles that should underpin the teaching intervention of physical education teacher at the time of applied the teaching ecological models.Los modelos ecológicos de la enseñanza en educación física se distinguen por su relevancia para la enseñanza centrada en el estudiante. En concreto, la Enseñanza de Juegos para la Comprensión y la pedagogía no lineal, son modelos que permiten un proceso de aprendizaje basado en la dinámica intrínseca de los juegos deportivos, especialmente por su relevancia para el desarrollo de conocimientos tácticos declarativo y procedimental de los estudiantes. Sin embargo, los modelos más recientes deben ser bien entendidos y dirigidos para dar lugar a efectos beneficiosos sobre el aprendizaje de los estudiantes. En consecuencia, este artículo tiene por objeto desarrollar los principios pedagógicos que subyacen en los modelos: i) seleccionar el tipo de juego; ii) la modificación del juego por representación; iii) la modificación por exageración; y iv) el ajuste de la complejidad táctica. En definitiva, se trata de definir los principios básicos que deben sustentar la intervención de la enseñanza de profesor de educación física en el momento de desarrollo de los modelos ecológicos de enseñanza.  Os modelos de ensino ecológicos na Educação Física distingue-se pela sua pertinência no sentido de centrar o ensino no aluno. Especificamente, os Teaching Games for Understanding e a Pedagogia Não-Linear são modelos que possibilitam um processo pedagógico baseado na dinâmica intrínseca dos jogos desportivos, destacando-se pela sua pertinência para o desenvolvimento do conhecimento tático declarativo e processual dos alunos. No entanto, como modelos recentes necessitam de ser devidamente compreendidos e orientados no sentido de resultaram proficuamente na intervenção didática. Nesse sentido o presente artigo procura desenvolver os princípios pedagógicos que baseiam os modelos: i) a seleção do tipo de jogo; ii) a modificação do jogo por representação; iii) a modificação por exagero; e iv) o ajustamento da complexidade tática. Em suma, procurar-se-á definir os princípios basilares que deverão sustentar a intervenção didática do professor de Educação Física, aquando dos modelos ecológicos de ensino

Utilização dos jogos reduzidos no ensino do handebol: a influência das ações táticas

O presente estudo objetivou analisar a influência de dois espaços diferenciados de prática na consecução de ações táticas de alunos durante a exercitação de formas de jogo reduzidas de handebol. Participaram no estudo oito alunos do género masculino (18,25 ± 1,04 anos de idade). Os resultados evidenciam diferenças estatisticamente significativas no que se refere aos indicadores de número de ataques (t(4) = 4,811; p-value = 0,009) e número de ataques organizados (t(4) = 6,364; p-value = 0,003). Através do presente estudo foi possível comprovar a pertinência da manipulação de constrangimentos da tarefa relacionados com o espaço, influenciando a concretização de ações táticas desempenhadas pelos alunos

Identifying the centrality levels of futsal players : a network approach

The aim of this study it was verify the differences of prominence levels between tactical positions in futsal (indoor football). For that reason, it was performed an analysis of variance between competitive levels and tactical positions for the centrality metrics computed by using network analysis. Forty-six futsal players from different competitive levels (U12, U14, U16 and Amateurs) it were analysed during three official futsal matches. Results revealed no differences in centrality metrics between competitive levels (p = 1.00; = 0.001; very small effect size) had no significant statistical differences in the centrality metrics. Nevertheless, tactical position (p = 0.001; = 0.593; moderate effect size) had significant main effects on the centrality metrics. Centrality metrics revealed that defenders are the most prominent players in to receive the ball. By the other hand, defenders and wings are the positions with greater centralities in to pass the ball for the teammates.info:eu-repo/semantics/publishedVersio

Towards a new method to analyze the soccer teams tactical behaviour : measuring the effective area of play

Recently, new tactical metrics have been developed to increase the match analysis’ potential. Naturally, innovate metrics need some updates in order to improve the utility to the soccer coaches. Thus, this paper aims to update the surface area metric, proposing the effective area of play given some efficacy information’s about team players’ positioning. Furthermore, aim analyzes the effective area of play of each team depending on the state of ball possession and a full match of 7-a-side soccer game in the district final was also analysed. Results showed an inverse correlation between teams’ opposite effective areas of play(rp = -0.681), suggesting the expansion-contraction relationship. Furthermore, was analyzed statistical differences with large effect between the moments with and without ball possession for the team A (F(1; 1506) = 1343.893; p-value ≤ 0.001; η2 = 0.472; Power = 1.000) and B (F(1; 1506) = 968.500; p-value ≤ 0.001; η2 = 0.391; Power = 1.000).info:eu-repo/semantics/publishedVersio

How team sports behave as a team? : general network metrics applied to sports analysis

The aim of this study was to analyse the general properties of networks in different team sports. Therefore, the analysis of variance to the general network properties between different team sports and different competitive levels was carried out. Sixty-six official matches (from Handball, Basketball, Football, Futsal, Rink-Hockey and Volleyball) were observed in five possible competitive levels (U12, U14, U16, U18 and Amateurs with more than 20 years). Analysis of variance revealed that the type of sport (p = 0.001; ��=0.647; moderate effect size) and competitive level(p = 0.001; �� = 0.355; small effect size)had significant statistical differences in the general network metrics. It was also found that football generates more connections between teammates but basketball and volleyball promote better results of density and clustering coefficient.info:eu-repo/semantics/publishedVersio