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Effects of acute fatigue in the functional performance of basketball players
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Resumo(s)
O presente estudo avaliou o impacto da fadiga aguda no desempenho funcional em jogadores de basquetebol. Para o efeito, uma amostra de 34 sujeitos foi testada antes e depois da execução de um protocolo de fadiga. O desempenho funcional foi avaliado através dos testes do sprint de 20 metros, do teste-t de agilidade e do teste 505 de agilidade. A indução de fadiga foi concretizada através de um protocolo de sprints repetidos, um método validado pela sua especificidade face às exigências do basquetebol (Castagna et al., 2007, 2008). O desempenho funcional dos jogadores comparado no pré e pós-PSR demonstrou diferenças significativas no teste de velocidade de 20 metros (t (33) = -3.961; p ˂ 0.001) e no teste t de agilidade (S+ = 454.5; S- = 140.5; z = -2.685; p ≤ 0.01). Com base na magnitude da fadiga, os sujeitos foram divididos em dois grupos: fadiga elevada e fadiga baixa. Diferenças significativas foram observadas entre o pré e pós-PSR para o sprint dos 20m nos dois grupos. Contudo, apenas o grupo de fadiga elevada apresentou diferenças significativas no teste 505 de agilidade (t (9) = -3.101; p ≤ 0.01). Estes resultados sugerem que a fadiga aguda pode influenciar o desempenho de jogadores de basquetebol em tarefas que dependam da capacidade de aceleração e de agilidade. Quando a magnitude da fadiga é tida em conta, jogadores com níveis de fadiga mais elevados também apresentam diferenças na capacidade de execução de mudanças de direção. Os treinadores e preparadores físicos de equipas de basquetebol devem considerar formas de gerir o impacto da fadiga aguda e como esta pode influenciar a performance funcional dos jogadores.
The study evaluated the impact of acute fatigue on basketball players' functional performance. A sample of 34 players was tested before and after a fatigue protocol. The 20-meter sprint, the agility t-test and the 505 test were analyzed. The induction of fatigue was accomplished through the Repeated Sprint Protocol, a method validated for its specificity with regard to basketball exertion (Castagna et al., 2007, 2008). The players' functional performance compared in pre and post-RSP demonstrated significant differences in the 20-meter sprint test (t (33) = -3.961; p ˂ 0.001) and in the agility t-test (S+ = 454.5; S- = 140.5; z = -2.685; p ≤ 0.01). Based on the fatigue level, players were divided into two groups: high-fatigue and low-fatigue. Significant differences were observed between pre and post-RSP for 20-meter sprint test for both groups. However, only the high-fatigue group demonstrated significant variations in the 505 agility test (t(9) = -3.101; p ≤ 0.01). These findings suggest that acute fatigue can influence basketball players' performance in tasks requiring acceleration speed and ability to change direction. When the level of fatigue is taken into account, players with a higher level of fatigue also show differences in change of direction performance that involve changes in direction of the displacements. Basketball coaches and physical trainers should consider ways in which acute fatigue can be managed and how it may affect the functional players' performance.
The study evaluated the impact of acute fatigue on basketball players' functional performance. A sample of 34 players was tested before and after a fatigue protocol. The 20-meter sprint, the agility t-test and the 505 test were analyzed. The induction of fatigue was accomplished through the Repeated Sprint Protocol, a method validated for its specificity with regard to basketball exertion (Castagna et al., 2007, 2008). The players' functional performance compared in pre and post-RSP demonstrated significant differences in the 20-meter sprint test (t (33) = -3.961; p ˂ 0.001) and in the agility t-test (S+ = 454.5; S- = 140.5; z = -2.685; p ≤ 0.01). Based on the fatigue level, players were divided into two groups: high-fatigue and low-fatigue. Significant differences were observed between pre and post-RSP for 20-meter sprint test for both groups. However, only the high-fatigue group demonstrated significant variations in the 505 agility test (t(9) = -3.101; p ≤ 0.01). These findings suggest that acute fatigue can influence basketball players' performance in tasks requiring acceleration speed and ability to change direction. When the level of fatigue is taken into account, players with a higher level of fatigue also show differences in change of direction performance that involve changes in direction of the displacements. Basketball coaches and physical trainers should consider ways in which acute fatigue can be managed and how it may affect the functional players' performance.
Descrição
Mestrado em Treino de Alto Rendimento. Universidade de Lisboa. Faculdade de Motricidade Humana
Palavras-chave
Acute fatigue Basketball Functional performance Repeated sprints Basquetebol Desempenho funcional Fadiga aguda Sprints repetidos