Papers by Felipe Luiz Santana
International Journal of Performance Analysis in Sport
The game of basketball involves several interactions of the offensive and defensive teams (i.e., ... more The game of basketball involves several interactions of the offensive and defensive teams (i.e., dynamics). The dynamics for defensive disruption can be organized in classes of equivalence defined herein as space creation dynamics (SCDs). The aims of this study were: a) to validate a set of SCDs classes for offensive actions and b) identify the recurrence of these classes on elite teams' games. SCDs definition and validation followed Fonseca's et al. (2008) criteria: 1a. proposition of a preliminary model of SCDs classes based on researchers experience and game analysis; 1b. expert improvement of the pre-defined proposal of SCDs; 1c. intra-observer and inter-observers reliability; 1d. application of the SCDs: analysis on elite basketball games. Resultant classes of SCDs (steps 1a-b): Space creation with ball dribbled (BD); Space creation with ball not dribbled (BND); Post Isolation (PostI); Perimeter Isolation (PerI); Space creation without the ball (WB); On ball screen (OnBS); Out-of-ball screen (OutBS). Reliability (1c): Kappa test intra-observer and inter-observer reliability range from (0.76-0.85) to (0.73-0.86), respectively. Inter-judges reliability indicates the usefulness of these classes for game analyses. (1d): "OnBS" presented the highest frequency of occurrence among elite teams (34.8%) indicating the relevance of pick and roll for teams' strategy.
Revista Brasileira de Educação Física e Esporte, 2011
O objetivo deste trabalho foi avaliar o efeito da experiência competitiva sobre as seguintes vari... more O objetivo deste trabalho foi avaliar o efeito da experiência competitiva sobre as seguintes variáveis de desempenho: 1) diversidade das dinâmicas de criação de espaço (DCEs) no setor defensivo; 2) eficiência das DCEs (i.e., frequência de êxito/total de execuções); 3) grau de cooperação ofensiva (i.e. número de passes e assistências). Foram analisados 46 jogos do Campeonato Paulista Masculino de Basquetebol (i.e. pré-mini a adulto). Variáveis medidas: 1) DCEs realizadas, que precederam o término da posse de bola em finalização, falta ou erro; 2) eficiência das DCEs; 3) passes em um ataque; 4) assistências. A reprodutibilidade foi testada pelo teste Kappa, tendo apresentado índices entre 0,78-0,85. A diversidade das DCEs não apresentou diferença significante para nenhuma classe de DCE entre todas as faixas etárias. Na análise intra-faixa etária, contra defesa individual, verificou-se significante predomínio de Desmarque com Bola com Drible para os mais jovens (pré-mini a infantil) e ...
Motriz: Revista de Educação Física, 2015
The aims of this study were twofold: i) to validate classes of defensive actions (i.e., space pro... more The aims of this study were twofold: i) to validate classes of defensive actions (i.e., space protection dynamics - SPDs) for containing offense in basketball; and ii) to propose a novel approach to analyze matches based on the interaction of a space creation dynamic (SCD) and a respective SPD. Kappa statistics revealed high intra- and inter-raters values, supporting the reliability of the defined SPDs. Six matches of the Spanish professional basketball finals were analyzed to achieve the second purpose of the present study. The SCD-SPD couples of actions were analyzed regarding their frequency of occurrence and variety until a scoring attempt. Teams' utilization of sequences of SCDs and SPDs was similar and short in length. Additionally, combining a second action with the first seemed to positively impact on offense success. The analysis of SCDs-SPDs interactions comprehend an innovative approach to the tactical evaluation of matches and may be helpful to interpret teams playin...
PLOS ONE, 2015
We analyzed the interaction between offensive (i.e. space creation dynamics-SCDs) and defensive (... more We analyzed the interaction between offensive (i.e. space creation dynamics-SCDs) and defensive (i.e. space protection dynamics-SPDs) actions in six play outcomes (free shot, contested shot, new SCD, reset, foul, and turnover) in Spanish professional basketball games. Method Data consisted of 1548 SCD-SPD-outcome triples obtained from six play-off games. We used Bayesian methods to compute marginal probabilities of six outcomes following five different SCDs. We also computed probabilities of the six outcomes following the 16 most frequent SCD-SPD combinations. Results The pick action (e.g. pick and roll, pop and pop) was the most prevalent SCD (33%). However, this SCD did not produce the highest probability of a free shot (0.235). The highest probability of a free shot followed the SCD without ball (0.409). The pick was performed not only to attempt scoring but also to initiate offenses, as it produced the highest probability leading to a new SCD (0.403). Additionally, the SPD performed influenced the outcome of the SCD. This reinforces the notion that the opposition (offensive-defensive interaction) should be considered. To the best of our knowledge, in team sports, this is the first study to successfully model the tactical features involved in offense-defense interactions. Our analyses revealed that the high frequency of occurrence of some SCDs may be justified not only by an associated high probability of free shots but also by the possibility of progressively create more space in the defense (i.e. a new SCD as outcome). In the second case, it
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Papers by Felipe Luiz Santana