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Objetivo: Este estudo teve como objetivo validar a FCLíq na estimativa do DE e na prescrição da intensidade do exercício, em jovens adultos masculinos. Métodos: O estudo teve uma população total de 40 sujeitos do sexo masculino entre os 18 e os 30 anos, posteriormente dividida em 2 grupos de 20 sujeitos; o primeiro de predição e o segundo de validação. Para a recolha da FC recorreu-se ao cardiofrequencímetro (Polar RS100, Finlândia). Os dados referentes ao VO2 foram recolhidos e analisados pelo analisador de gases (Metalyzer 3B, Cortex Biophysic, Alemanha). Os valores de 1 MET foram considerados os valores de VO2Rep de cada sujeito. O DE foi avaliado pelo software associado ao analisador de gases que tinha em conta o quociente respiratório. Para a análise de dados foi utilizado o software Statistical Package for the Social Sciences. Recorreu-se ao teste Kolmogorv-Smirrnov para verificar a normalidade da população, para analisar as diferenças entre grupos recorreu-se ao t-teste para amostras independentes, para analisar as diferenças entre os valores reais e os valores estimados foram utilizados t-teste para amostras emparelhadas. A determinação das equações de regressão recorreu a regressões lineares. Os gráficos de dispersão foram utilizados para determinar as relações entre as variáveis. Resultados: Não se verificaram diferenças estatisticamente significativas entre grupos no peso, IMC, VO2Rep, FCRep e DE. A equação preditora de VO2 baseada na FCLíq, a partir do grupo 1 foi: VO2sepc=4,893+0,337xFCLíq. As correlações obtidas, de VO2, entre os valores reais com os preditos, foram: R=0,92 e R=0,95 para o grupo 1 e grupo 2 respetivamente. Existiram diferenças estatisticamente significativas nos dois grupos entre o VO2Rep real com o estimado e no DE em repouso real com o estimado, porém nos patamares de exercício não houve diferenças significativas em nenhum dos grupos em ambas as variáveis. A equação que determinou a intensidade em MET na totalidade da população foi: METLíq=0,280+0,082xFCLíq, chegando assim a um incremento de 12bpm de FCLíq para aumentar 1MET de intensidade. Conclusões: A FCLíq mostrou ser uma forma válida de determinar o DE em exercício e de prescrever intensidade de exercício em jovens adultos do sexo masculino.
Objective: The aim of this study is validate the NetHR in estimating EE and prescription intensity of exercise in young adults male. Methods: The study had a total population of 40 male subjects between 18 and 30 years, then divided into 2 groups of 20 subjects, the first one prediction group and the second one validation group. For the collection of HR we used the heart rate monitor (Polar RS100, Finland). The data relating to VO2 were collected and analyzed by gas analyzer (Metalyzer 3B, Cortex Biophysic, Germany). The 1MET were considered the values of VO2Rest of each subject. The EE was assessed by the software associated with the gas analyzer that took account of the respiratory quotient. For data analysis we used the software Statistical Package for Social Sciences. We used the Kolmogorv-Smirrnov test to verify the normality of the sample. To analyze the differences between groups was used the t-test for independent samples and to analyze the differences between real values and estimated values were used t-test for paired samples. For determination of the regression equations we used linear regressions. Scatter charts were used to determine the relationships between variables. Results: There were no statistically significant differences between groups in weight, BMI, VO2Rest, HRRest and EE. The predictive equation of VO2 based on NetHR determined in group 1 was: VO2sepc=4,893+0,337xFCLiq. The correlations of VO2 between the real values with the predicted values were: R = 0.92 and R = 0.95 for group 1 and group 2 respectively. There were statistically significant differences in both groups, between the real VO2Rest with the estimated values and real EE at rest with estimated values, but in exercise there were no significant differences in either group in both variables. The equation that determined the intensity in MET with the whole population was: NetMET=0,280+0,082xNetHR, achieving an increase of 12bpm of NetHR to increase 1MET intensity. Conclusions: NetHR proved to be a valid way to determine EE in exercise and prescribing exercise intensity in young adult males.
Objective: The aim of this study is validate the NetHR in estimating EE and prescription intensity of exercise in young adults male. Methods: The study had a total population of 40 male subjects between 18 and 30 years, then divided into 2 groups of 20 subjects, the first one prediction group and the second one validation group. For the collection of HR we used the heart rate monitor (Polar RS100, Finland). The data relating to VO2 were collected and analyzed by gas analyzer (Metalyzer 3B, Cortex Biophysic, Germany). The 1MET were considered the values of VO2Rest of each subject. The EE was assessed by the software associated with the gas analyzer that took account of the respiratory quotient. For data analysis we used the software Statistical Package for Social Sciences. We used the Kolmogorv-Smirrnov test to verify the normality of the sample. To analyze the differences between groups was used the t-test for independent samples and to analyze the differences between real values and estimated values were used t-test for paired samples. For determination of the regression equations we used linear regressions. Scatter charts were used to determine the relationships between variables. Results: There were no statistically significant differences between groups in weight, BMI, VO2Rest, HRRest and EE. The predictive equation of VO2 based on NetHR determined in group 1 was: VO2sepc=4,893+0,337xFCLiq. The correlations of VO2 between the real values with the predicted values were: R = 0.92 and R = 0.95 for group 1 and group 2 respectively. There were statistically significant differences in both groups, between the real VO2Rest with the estimated values and real EE at rest with estimated values, but in exercise there were no significant differences in either group in both variables. The equation that determined the intensity in MET with the whole population was: NetMET=0,280+0,082xNetHR, achieving an increase of 12bpm of NetHR to increase 1MET intensity. Conclusions: NetHR proved to be a valid way to determine EE in exercise and prescribing exercise intensity in young adult males.
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Keywords
Jovens adultos FC líquida MET Prescrição de exercício VO2