Efeitos de um protocolo de treinamento excêntrico sobre o desempenho de velocidade para adolescentes chilenos
DOI:
https://doi.org/10.15359/mhs.19-1.3Palavras-chave:
Velocidade, contração muscular, treinamento físicoResumo
Introdução: Os benefícios do treinamento de força na velocidade de corrida foram descritos na literatura especializada, no entanto, não foram demonstradas evidências sobre a influência de estímulos específicos, baseados em contrações excêntricas na musculatura extensora do quadril. Objetivo: Determinar os efeitos de um protocolo de treinamento baseado em contrações excêntricas (cacho nórdico) em velocidade de corrida de 20 m em adolescentes da região do Ñuble, Chile. Metodologia: 42 escolares foram divididos em um grupo experimental (n=22) e um grupo controle (n=20). O treino foi desenvolvido durante 6 semanas, com uma frequência de 2 sessões/semana, passando de um volume de 8 para 32 repetições de ondulação nórdica por sessão para o grupo experimental. O desempenho da velocidade foi avaliado acima de 20 metros. O teste T de Student foi usado para comparar os resultados pré e pós-intervenção e o tamanho do efeito (TE) foi calculado. Resultados: Foram encontradas diferenças estatisticamente significativas (p<0,05) da intervenção no grupo experimental (pré= 3,43 s. vs pós= 3,15 s.), e um TE grande (1,04). Conclusão: Conclui-se que o treinamento excêntrico baseado na aplicação do Curl nórdico melhora o desempenho da velocidade de corrida.
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