Rui Ângelo

Paulo Mourão

Alberto Carvalho

Carlos Carvalho

Laboratório do Movimento Humano

Instituto Superior da Maia

Portugal.

Resumo

Ao longo do presente estudo procuramos analisar os efeitos subjacentes à utilização de metodologias combinadas de treino, consistentes na associação de electroestimulação com uma tipologia específica de exercitação aeróbia em cicloergómetro. Procuramos assim determinar a sua influência sobre a potência máxima aeróbia. A amostra foi constituída por 12 sujeitos, subsequentemente divididos aleatoriamente por 2 grupos. O processo de treino desenrolou-se ao longo de 4 semanas, nas quais os mesmos efectuaram 4 sessões de treino semanal com a duração de 50 minutos, sendo que para um dos grupos em 3 das sessões era acrescentado um protocolo simultâneo de electroestimulação. Para a determinação específica da potência máxima aeróbia foi seleccionado um teste máximo por patamares para cicloergómetro. Verificamos que apenas o grupo assistido por electroestimulação apresentou uma evolução estatisticamente significativa sobre o VO2máx (13,1%; p=0,01; p<0,05) quando em comparação com o grupo de controlo (11,3%; p=0,06; p<0,05) relativamente à diferença pré-pós teste. Podemos concluir que a utilização de electroestimulação em simultâneo com uma exercitação de carácter cíclico irá aparentemente promover uma superior eficiência evolutiva sobre VO2Máx, proporcionando a obtenção de resultados significativos em intervalos de tempo comparativamente inferiores àqueles promovidos pelas metodologias convencionais de exercitação aeróbia com ênfase cardiovascular.

Palavras-Chave: Electroestimulação, Vo2máx, Cicloergómetro.

Combined intervention of neuromuscular electrical stimulation and cycling exercise in Maximal Oxygen Intake Output.

Abstract

The main purpose of our study was to test the direct effect of using combined electrical muscle stimulation with endurance cycling exercises over the maximal oxygen intake factor. We used a sample of 12 subjects, subsequently split into to different groups of 6. All subjects were participants in a four week, four times per week, 50 minute cycling training protocol. One group was also subjected to a simultaneous electrical muscle stimulation protocol on three of the training sessions. To assess maximal aerobic power output we used a maximal cycle-ergometer test with step by step load increases. Our results demonstrated that the muscle stimulation assisted group revealed a statistically significant Vo2máx increase, as well as a higher physical fitness development when comparing within group heart rate evolution. However, between group difference was not significant. We may thus conclude that combined training methodologies may contribute to a faster and more effective goal achievement when regarding VO₂máx variables.

Keywords: Neuromuscular Electrical Stimulation, Maximal Oxygen Intake, Cycling exercise

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Data de submissão: Dezembro 2007

Data de Aceite: Abril 2007

Correspondência:

Laboratório do Movimento Humano

Portugal.

acarvalho@ismai.pt.