Changes in the concentration of glucose in the blood during intermittent exercise performed on a treadmill at 70%, 80% and 90% of V[O.sub.2] max estimated/Alteracoes na concentracao de glicose no sangue durante exercicio intermitente realizado em esteira a 70%, 80% e 90% do V[O.sub.2] maximo estimado

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Date: September-October 2009
Publisher: Instituto Brasileiro de Pesquisa e Ensino em Fisiologia do Exercicio. IBPEFEX
Document Type: Article
Length: 3,278 words

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Abstract :

This study aims to observe changes in blood glucose caused by intermittent exercise performed on a treadmill, using labor intensities of 70, 80 and 90% of estimated maximum V[O.sub.2]. Eighteen men participated of this study, divided into 3 groups of 6 individuals, with a specific intensity of work for each group. The intensity of work was indirectly estimated through maximum progressive test on a treadmill, until voluntary maximum exhaustion. Everyone who joined this work was physically active and practiced running, with an average age of 22.16, 73.04 kg of body weight, 175.78 cm in height and 59.3 ml/kg/min of estimated maximum V[O.sub.2]. Before the study began, everyone who was in it answered negatively to the Questionnaire of Readiness for Physical Activity and signed a consent term. The next steps were based on measures of body weight and height, maximum V[O.sub.2] test on a treadmill. After the performance was over, within a break of 48 hours, the participants were submitted to an experimental protocol, which held 20 stimuli of 1 minute each with a pause of 30 seconds, including collection of blood glucose at the beginning and the end of the 5th, 10th, 15th and 20th stimulus process. The glicemy response after the 5th stimulus was lower in all groups and a significant difference could be observed between the groups of 70% and 80% and also between the ones of 70% and 90%. It was not possible to observe the same between the groups of 80% and 90%. The increase in the group of 90% was slightly higher, which does not represent a significant difference. Key Words: glicemy, intermittent exercise, maximum V[O.sub.2] O presente estudo tem como objetivo observar alteracoes na glicose sanguinea ocasionadas pelo exercicio intermitente realizado em esteira, utilizando intensidades de trabalho de 70, 80 e 90% do V[O.sub.2] maximo estimado. Participaram do estudo dezoito homens, divididos em 3 grupos de 6 individuos, cada grupo correspondendo a uma intensidade de trabalho. A intensidade de trabalho foi estimada de forma indireta atraves de teste maximo progressivo em esteira, ate a exaustao maxima voluntaria. Todos os sujeitos se encontravam fisicamente ativos, praticantes de corrida com idade media de 22,16 anos, peso corporal 73,04 kg, estatura 175,78 cm e V[O.sub.2] maximo estimado 59,3 ml/kg/min. Antes de participar do estudo todos responderam negativamente ao Questionario de Prontidao para Atividade Fisica e assinaram um termo de consentimento. As etapas seguintes foram medidas do peso e estatura corporal, teste de V[O.sub.2] maximo em esteira; apos o teste, com intervalo de 48 horas, os individuos foram submetidos ao protocolo experimental onde realizaram 20 estimulos de 1 minuto com pausa de 30 segundos, e coleta de glicose sanguinea no inicio e ao final do 5[degrees], 10[degrees], 15[degrees] e 20[degrees] estimulo. A resposta da glicemia apos o 5[degrees] estimulo foi mais baixa em todos os grupos, sendo observada diferenca significativa entre os grupos 70% e 80% e tambem entre os grupos 70% e 90%. O mesmo nao foi observado entre os grupos 80% e 90%, no qual o aumento no grupo 90% foi discretamente maior nao representando diferenca significativa. Palavra-chave: glicemia, exercicio intermitente, V[O.sub.2] maximo.

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Gale Document Number: GALE|A389936822