Navegando por Palavras-chave "work capacity"

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    Differences between remaining ability and loss of capacity in maximum aerobic impairment
    (Associação Brasileira de Divulgação Científica, 1998-05-01) Neder, Jose Alberto [UNIFESP]; Nery, Luiz Eduardo [UNIFESP]; Bagatin, Edileia [UNIFESP]; Lucas, Sandra Regina Rodrigues [UNIFESP]; Anção, Meide Silva [UNIFESP]; Sue, D.y.; Universidade Federal de São Paulo (UNIFESP); Universidade Estadual de Campinas (UNICAMP); Harbor-UCLA Medical Center
    In the evaluation of exercise intolerance of patients with respiratory diseases the American Medical Association (AMA) and the American Thoracic Society (ATS) have proposed similar classifications for rating aerobic impairment using maximum oxygen uptake (VO2max) normalized for total body weight (ml min-1 kg-1). However, subjects with the same VO2max weight-corrected values may have considerably different losses of aerobic performance (VO2max expressed as % predicted). We have proposed a new, specific method for rating loss of aerobic capacity (VO2max, % predicted) and we have compared the two classifications in a prospective study involving 75 silicotic claimants. Logistic regression analysis showed that the disagreement between rating systems (higher dysfunction by the AMA/ATS classification) was associated with age >50 years (P<0.005) and overweight (P = 0.04). Interestingly, clinical (dyspnea score) and spirometric (FEV1) normality were only associated with the VO2max, % predicted, normal values (P<0.01); therefore, in older and obese subjects the AMA/ATS classification tended to overestimate the aerobic dysfunction. We conclude that in the evaluation of aerobic impairment in patients with respiratory diseases, the loss of aerobic capacity (VO2max, % predicted) should be used instead of the traditional method (remaining aerobic ability, VO2max, in ml min-1 kg-1).
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    Six-minute walk test in healthy children: Is the leg length important?
    (Wiley-Blackwell, 2013-09-01) Oliveira, Andreia C. [UNIFESP]; Rodrigues, Camila C. [UNIFESP]; Rolim, Denise S. [UNIFESP]; Souza, Altay A. L. [UNIFESP]; Nascimento, Oliver A. [UNIFESP]; Jardim, Jose R. [UNIFESP]; Rozov, Tatiana [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Rationale Measures as height, age, and weight influence the six-minute walk test (6MWT). It was shown that children's true leg length (TLL) influence the 6MWT distance but so far it has never been evaluated how much this variable could predict the distance walked related to height. Our hypothesis is that there should not have any significant difference between models including height or TLL.Objective To establish and to compare the predicted walked distance of healthy children in the 6MWT by two distinct models, one including TLL and other including height.Methods Observational cross sectional study. A total of 161 healthy children (84 girls, 52.2%), 6-13 years old from three local primary and secondary schools. Two 6MWT were performed following ATS guidelines. Weight, height, and TLL were measured. the longer walked distance was selected for statistical analysis.Results Anthropometric data were similar for both genders into each group of age. Mean (+/- SD) walked distances in whole group were: boys 704.4m (77.7); girls 681.6m (67.9; P=0.049). in the univariate regression to predict the distance walked, the adjusted coefficients to TLL and height were in boys: 0.46 and 0.39; and in girls: 0.35 and 0.29, respectively. After adjusting for age and weight, the residuals of the two equations were not significantly different (P=0.998).Conclusion the model including TLL to predict the walked distance by healthy children explained more of the variation on the walked distance in the 6MWT than the model using the height but without significant difference between the models. Pediatr Pulmonol. 2013; 48:921-926. (c) 2012 Wiley Periodicals, Inc.