ABSTRACT This study investigated the effects of manipulating the net height in 4 vs. 4 small-sided games on the tactical-technical performance of professional female volleyball athletes. Eight professional female athletes participated in this study, playing 4 vs. 4 small-sided games at three net heights: 2.15 m, 2.24 m, and 2.33 m. The technical-tactical actions (Specific Performance per Action, Specific Performance per Component, and General Performance) were analyzed through the IAD-VB. Results indicated that the lower net height favored the complex 0 actions (p=0.034; V=0.329), while the higher net height favored setting (p=0.001; V=0.449), attack (p=0.038; V=0.325), and defense (p<0.001; V=0.731) action structuring. Additionally, the net height was associated with the decision-making component (p=0.011; V=0.368), suggesting that this specific manipulation may affect the complexity of the decision-making process in the game setting.

RESUMEN Este studio tuvo como objetivo investigar los efectos de la manipulación de la altura de la red em juegos reducidos de 4 vs. 4 sobre el rendimiento táctico-técnico de atletas profesionales de voleibol femenino. Participaron ocho atletas femininas professionais, que jugaron 4 vs. 4 en tres alturas de red: 2,15 m, 2,24 m y 2,33 m. Las acciones técnico-tácticas (Rendimiento Especifico por Acción, Rendimiento Especifico por Componente y Rendimiento General) fueron analizadas mediante el IAD-VB. Los resultados indicaron que la menor altura favoreció las acciones del complejo 0 (p=0.034; V=0.329), mientras que la mayor altura de la red favoreció la distribuición (p=0.001; V=0.449), ataque (p=0.038; V=0.325) y la estructuración defensiva (p<0.001; V=0.731). Además, la altura de la red se asoció con el componente de toma de decisión (p=0.011; V=0.368), lo que sugiere que esta manipulación específica puede afectar la complejidad del proceso de toma de decisión en el scenario del juego.

RESUMO Esse estudo objetivou investigar os efeitos da manipulação da altura da rede em jogos reduzidos de 4 x 4 no desempenho tático-técnico de atletas profissionais femininas de voleibol. Participaram oito atletas femininas profissionais, que jogaram 4 x 4 em três alturas de rede: 2,15 m, 2,24 m e 2,33 m. As ações técnico-táticas (Desempenho Específico por Ação, Desempenho Específico por Componente e Desempenho Geral) foram analisadas através do IAD-VB. Os resultados indicaram que a menor altura favoreceu as ações do complexo 0 (p=0.034; V=0.329), enquanto a maior altura da rede favoreceu o levantamento (p=0.001; V=0.449), ataque (p=0.038; V=0.325), e estruturação das ações defensivas (p<0.001; V=0.731). Adicionalmente, a altura da rede foi associada ao componente de tomada de decisão (p=0.011; V=0.368), sugerindo que esta manipulação específica pode afetar a complexidade do processo de tomada de decisão no cenário de jogo.

This study aimed to identify the predictive factors of attacks, performed from positions 1 and 6 according to the effect of reception in high level Brazilian male volleyball and to find the predictive factors that differentiate the game practiced from these positions. The sample consisted in the observation of 142 games of the Brazilian Men's Super League, totalling 2969 actions of reception, setting and attack from positions 1 and 6. The significance value adopted was 5% (p ≤ 0.05). The analysis of the predictive factors of the game performed by the attacker of position 1 showed greater chances to score after an excellent (odds ratio adjusted - ORA = 1.48) and moderate effect of reception (ORA = 1.31), the second attack tempo (ORA = 1.32), the powerful attack in parallel (ORA = 1.91) and in diagonal (ORA =3.44). The attacker of position 6 showed higher chances of scoring after a high effect of reception (ORA = 3.39) and powerful attack in the parallel (ORA = 1.53). In conclusion, regardless the effect of reception, the use of the back-row attackers is recommended to increase the uncertainty on the opposing team and the chances to score.