Respostas neuromusculares, metabolicas e percepção de esforço durante exercicios intermitentes de alta intensidade / Metabolic and neuromuscular responses and rate of perceived exertion during high-intensity intermittent exercise

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The purpose of this study was to evaluate the effects of different work: rest time relation during high-intensity intermittent exercise on the neuromuscular responses, blood lactate levels (LAC) and rate of perceived exertion (RPE). Twelve male cyclists performed three protocols of high intensity intermittent exercise. The protocols of long intermittent exercise tests (IEL = 4 x 30 s, with two minutes rest between each test), medium intermittent exercise (IEM = 8 x 15 s, with one minute rest between the tests) and short intermittent exercise (IES = 16 x 7,5 s, with 30 s rest between tests) were conducted randomly, separated by 48 hours. The rates of decline in peak power and total work were higher (P<0,05) on the protocols IEL (12 and 15%) and IEM (11 and 13%) when compare to IES (4 and 7%), respectively. The total work done during protocols IEM (70143 J) and IES (67071 J) were higher (P<0,05) when compare to IEL (62011J). There was a reduction (P<0,05) in electromyography activity (root-mean-square RMS) during the protocols of IEL and IEM, however, no significant changes in IES were found. Considering the median frequency from the electromyography signals, there was only significant reduction in IEL. The LAC and RPE were higher in IEL and IEM when compared to IES. According to the results is possible to conclude that the IEL and IEM protocols cause higher neuromuscular fatigue, LAC and RPE.

ASSUNTO(S)

fadiga fadigue perception percepção treinamento intervalado eletromiografia interval training electromyography lactate lactado

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