Sequence and efficacy of game complexes in high-level women's volleyball: A novel perspective through Social Network Analysis

The stereotyped sequence of volleyball actions allows organising them into six game complexes (K), each with specific dynamics. The purpose of this study was to verify the game flow in high-level women's volleyball through the sequencing of game complexes, their relative importance within the game and their relationship to attack efficacy. Seven matches of the Women's Brazil Cup'2020, knockout competition played by the 8 best teams of the 2019/2020 Superliga, were analysed (31 sets, 1268 rallies). The matches were obtained through the online video platform www.youtube.com . Pearson's chi-squared test (chi(2)) with Monte Carlo correction was used to assess the association between the variables, and Social Network Analysis with Eigenvector Centrality for the understanding of the nodes interactions their relative importance in a global context The highest frequencies occurred for K0 (28.75%), KI (25.54%), and KII (23.39%), followed by Kill (15.60%), KV (3.73%), and KIV (2.99%). Positive associations occurred between KI and error; K0 and first KIV and continuity; and between KI, KII, first KIII, second KIII, first KV or second KV and point. The highest Eigenvector Centrality values occurred in first KVEI and first KIVEI, and the lowest in K0E0, K0E2 and seventh KIIIE0. The results showed that the game complexes unfold in sequences with different frequencies; the sequences K0EI-KIE2, K0EI-KIEI-KIIE2; K0EI-KIE0 and K0EI-KIEI-KIIEI-KIII( I )E2 are the most frequent, which is informative for approximating the regularities of the training sessions to those of the matches.