Prediction of metabolic and cardiopulmonary responses to maximum cycle ergometry: a randomised study

Prediction of metabolic and cardiopulmonary responses to maximum cycle ergometry: a randomised study

Autor Neder, Jose Alberto Autor UNIFESP Google Scholar
Nery, Luiz Eduardo Autor UNIFESP Google Scholar
Castelo Filho, Adauto Autor UNIFESP Google Scholar
Andreoni, Solange Autor UNIFESP Google Scholar
Lerario, Maria Cristina Autor UNIFESP Google Scholar
Sachs, Anita Autor UNIFESP Google Scholar
Silva, Antonio Carlos da Autor UNIFESP Google Scholar
Whipp, B. J. Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
St Georges Hosp
Univ London
Resumo All of the most widely-cited studies for the prediction of maximum exercise responses have utilized either volunteers or referred subjects. Therefore, selection bias, with overestimation of the reference values, is a likely consequence.In order to establish a set of predictive equations for the gas exchange, ventilatory and cardiovascular responses to maximum ramp-incremental cycle ergometry, this study prospectively evaluated 120 sedentary individuals (60 males, 60 females, aged 20-80), randomly-selected from >8,000 subjects. Regular physical activity pattern by questionnaire, body composition by anthropometry and dual energy X-ray absorptiometry (n=75) and knee strength by isokinetic dynamometry were also assessed.Previously reported equations typically overestimated the subjects' peak oxygen uptake (p<0.05). Prediction linear equations for the main variables of clinical interest were established by backward stepwise regression analysis including: sex, age, knee extensor peak torque, bone-free lean leg mass, total and lean body mass, height, and physical activity scares. Reference intervals (95% confidence limits) were calculated: some of these values differed markedly from those formerly recommended.The results therefore might provide a more appropriate frame of reference for interpretation of the responses to symptom-limited ramp incremental cycle ergometry in sedentary subjects; i.e. those usually referred tor clinical cardiopulmonary exercise tests.
Assunto cycle ergometry
exercise
oxygen consumption
reference values
Idioma Inglês
Data 1999-12-01
Publicado em European Respiratory Journal. Copenhagen: Munksgaard Int Publ Ltd, v. 14, n. 6, p. 1304-1313, 1999.
ISSN 0903-1936 (Sherpa/Romeo, fator de impacto)
Editor Munksgaard Int Publ Ltd
Extensão 1304-1313
Fonte http://dx.doi.org/10.1183/09031936.99.14613049
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000084385900012
URI http://repositorio.unifesp.br/handle/11600/26183

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