Abstract
Muscle power is one of the most important physical qualities of soccer player performance and needs to be maintained during a match. Thus, the aim of this study was to investigate the levels of muscle power in soccer players before and after performing repeated sprints (RS), and the association between power and RS performance. Twenty soccer players from the under-20 category aged 18-20 years participated in this study. The study consisted of the execution of vertical jumps, execution of RS, new execution of vertical jumps, and collection of blood samples. The continuous jump (CJ) test was performed on a piezoelectric force platform for the measurement of muscle power and the RAST test was used to evaluate RS ability. No significant difference in the levels of muscle power was observed after RS (p=0.57). Significant differences were observed in the first to fifth sprint times (p< 0.01), but not between the fifth and sixth sprint (p=0.06). CJ height before RS was correlated with first sprint time (r=-0.62, p< 0.01), best sprint time (r=-0.60, p< 0.01), and average sprint time (r= -0.54, p<0.01). In conclusion, the soccer players studied showed no significant reduction in muscle power after RS. A decrease in performance was observed from the first to the fifth sprint, but not between the fifth and sixth sprint. The muscle power of soccer players was a determinant factor to perform one maximum sprint, as well as successive sprints.
Highlights
O futebol pode ser considerado uma modalidade esportiva na qual solicita dos jogadores, além de condições técnicas e táticas, diferentes qualidades físicas
Em outro estudo[9 ], foi reportada correlação entre o desempenho em sprints de 30 m e a altura no Counter Movement Jump (CMJ)
Tendo em vista os valores apresentados pelos atletas avaliados neste estudo, pode-se sugerir que os mesmos foram capazes de manter a performance após a realização dos sprints, com pouco efeito deletério do possível quadro de fadiga muscular
Summary
Resumo – A potência muscular é uma das qualidades físicas mais importantes da performance de jogadores de futebol, sendo imprescindível a manutenção da mesma no decorrer da partida. Objetivou-se investigar os níveis de potência muscular em jogadores de futebol antes e após realizarem sprints repetidos (SR), assim como as relações entre a potência e o desempenho nos SR. Não foi observada diferença significativa nos níveis de potência muscular após a realização dos SR (p=0,57). Verificou-se diferença significativa nos tempos do primeiro até o quinto sprint (p
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