Flavio G. Suzuki ¹

Nilo M. Okuno ¹

Adriano E. Lima-Silva ³

Luiz A. B. Perandini ¹

Eduardo Kokubun ⁴

Fábio Y. Nakamura ^1,2

¹Grupo de Estudo das Adaptações Fisiológicas ao Treinamento (GEAFIT). Centro de Educação Física e Desportos, Universidade Estadual de Londrina, Brasil

³Laboratório de Pesquisa Morfo-Funcional, Universidade do Estado de Santa Catarina, Brasil

⁴Instituto de Biociências, Departamento de Educação Física, Universidade Estadual Paulista, Brasil

Resumo

O objetivo deste estudo foi verificar os efeitos das pausas e das intensidades na resposta de esforço percebido durante o treinamento intervalado na natação. Oito indivíduos realizaram inicialmente repetições de 100, 200 e 400 m para a determinação da velocidade crítica (VC) e capacidade de trabalho anaeróbio (CTA). Em outras ocasiões, os sujeitos foram submetidos a quatro sessões de treinamento intervalado realizando repetições de 200 m. Foram realizadas duas sessões a 95% e outras duas a 110% da VC. A única diferença entre as sessões na mesma intensidade de exercício foram os intervalos das pausas, de 20 ou 40 s. Ao final de cada repetição de 200 m, os participantes reportavam o esforço percebido por meio da escala de Borg. A 95% da VC não foi verificada diferença significativa no comportamento do esforço percebido entre os regimes de pausas de 20 e 40 s. Em contraste, a 110% da VC houve diferenças significativas no esforço percebido reportado e no número de repetições realizadas (40 s = 5,7 ± 2,1 repetições; 20 s = 4,0 ± 1,0 repetições) entre os regimes de pausas. Dessa forma, o possível mecanismo explicativo para as respostas do esforço percebido abaixo e acima da VC em diferentes regimes de pausas parece ser a utilização ou não da CTA.

Palavras-chave: natação, velocidade crítica, esforço percebido.

Perceived exertion during swimming interval training at intensities below and above critical velocity

The aim of the present study was to verify the effects of rest intervals and intensities in perceived exertion responses during swimming interval training. Eight individuals performed initially 100, 200 and 400 m bouts for the critical velocity (VC) and anaerobic work capacity (CTA) estimation. Additionally the subjects were submitted to four sessions of interval training comprised by 200 m bouts. It was conducted in two sessions at 95% and 110% of VC. The only difference between the sessions at the same intensity of exercise was the rest intervals of 20 or 40 s. At the final of each 200 m bout, the participants reported the perceived exertion through Borg scale. At 95% of VC there was not significant difference in perceived exertion responses between the 20 and 40 s rest intervals regimes. Nonetheless, at 110% of VC there were significant differences in the perceived exertion reported and in number of performed bouts (40 s = 5.7 ± 2.1 bouts; 20 s = 4.0 ± 1.0 bouts) between the rest intervals regimens. Therefore, the possible mechanism for the perceived exertion responses below and above the VC under different rest intervals regimens seems to be the utilization or not of CTA.

Key-words: swimming, critical velocity, perceived exertion.

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Correspondência

Fábio Yuzo Nakamura

Grupo de Estudo das Adaptações Fisiológicas ao Treinamento

Centro de Educação Física e Desportos, Universidade Estadual de Londrina

Rod. Celso Garcia Cid, km 380, Campus Universitário

e-mail: fabioy_nakamura@yahoo.com.br