Validação das equações metabólicas para caminhada e corrida propostas pelo American College of Sports Medicine em homens entre 20 e 30 anos de idade

Abstract

RESUMOO American College of Sports Medicine (ACSM) sugere equações para estimativa do gasto metabólico da caminhada e da corrida, concebidas a partir de pressupostos: 1) que o indivíduo esteja executando uma atividade em estado de equilíbrio e 2) que o consumo de oxigênio (VO 2 ) tem relação linear com a intensidade do trabalho. O objetivo deste estudo foi verificar a validade concorrente dessas equações metabólicas em homens regularmente ativos entre 20 e 30 anos de idade, tendo como medida critério a espirometria (TEEM-100, AeroSport ABSTRACTThe American College of Sports Medicine (ACSM) has proposed equations for estimating metabolic cost of walking and running, which were based on two conditions: 1. that the subject is performing a steady state exercise, and 2. that the oxygen consumption (VO 2 ) has a linear relationship with the workload. The purpose of this study was to verify the concurrent validity of these equations among men, aged 20 to 30 years and who were regularly active, using the spirometry as a criterion measure (AeroSport TEEM-100 gas analyzer). The sample was composed of 36 men. On day 1, they performed a maximal exercise test on a treadmill (ATL 10200, INBRASPORT). The subjects completed a standard 6-stage protocol with different speeds (80.4, 120.6 and 160.8 m.min -1 ) and grades (0 and 5%), 48 to 96 hours after maximal test. Besides descriptive statistics, other procedures included Pearson's linear correlation, the coefficient of determination, one-way ANOVA and paired t-Student test with level of significance established at 0.05. The analyses were performed with the SPSS package. The results showed that there was VO 2 overestimation for both activities (p < 0.05), especially for running, except at 80.4 and 120.6 m.min -1 , with no inclination (mean difference from -30 to 20% for walking and 3.2 to 12% for running). The standard error of the estimate (SEE) varied between 1.56 and 3.15 ml O 2 .kg -1 .min -1 and around 3.5 ml O 2 .kg -1 .min -1 , for walking and running, respectively. Correlation coefficients were greater than 0.7 for all stages. However, according to Lohman's criteria (1992), the equations were not validated. Therefore, among young men, SEE should be taken into account, due to the fact that the ACSM equations for walking and running overestimate VO 2 values.

Comparison of VO2max Estimations for Maximal and Submaximal Exercise Tests in Apparently Healthy Adults

“…The horizontal and vertical components appear to be based on Dill [ 28 ]’s work with only 3 male subjects, and Balke and Ware [ 29 ]’s work with 500 male military and civilian personnel [ 14 ], respectively. In summary, as pointed out by Filardo, Silva [ 30 ], although the ACSM’s metabolic equations have been proposed for widespread use, they are based on studies that do not indicate such use.…”

“…Therefore, the superiority of submaximal exercise tests over maximal exercise tests (7.3% and 8.1% vs. 20.9% overestimation) might be attributed to some of the factors explaining the inaccuracy of the ACSM equations for maximal exercise tests, such as the assumption of a steady state and the higher contribution of the anaerobic system. Additionally, Cunha, Catalao [ 33 ] found that the velocities defined using the ACSM metabolic equation overestimate energy expenditure, and other studies have shown overestimations using the ACSM running equation during submaximal steady-state intensities [ 13 , 30 ]. Although submaximal exercise tests provided more accurate results compared to maximal exercise tests, it is evident that the documented overestimation could impact the ability to accurately measure VO 2 max.…”

Comparação entre os métodos direto e indireto de determinação do consumo máximo de oxigênio em mulheres corredoras

“…Brum et al (24) , Filardo et al (25) and Costa et al (14) assessed, respectively, the run and gait equations by the ACSM (11,26,27) for estimation of the O 2 and also found results which overestimated the direct measurement, pointing to the need to specify the study of the indirect methods by gender, age and physical status.…”

Protocolo de Rampa vs Escalonado: Análise do Consumo de Oxigênio e Frequência Cardíaca em Jovens

“…A principal característica desse protocolo é a individualização na progressão das cargas de trabalho e seu aumento contínuo em segundos 2,[9][10][11][12] . No entanto, esse é um procedimento que não se encontra disponível em todas as regiões brasileiras, o que leva à utilização dos protocolos escalonados clássicos e à aplicação de equações de estimativa do consumo máximo de oxigênio (VO 2máx ), que podem subestimar a condição física 4,13,14 . O que seria um ponto de controvérsia uma vez que Santos, et al, 10 concluem que a equação proposta pelo Colégio…”