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. 1995 Aug;50(8):829–833. doi: 10.1136/thx.50.8.829

Comparison of peak oxygen consumption during cycle and treadmill exercise in severe chronic obstructive pulmonary disease.

R S Mathur 1, S M Revill 1, D D Vara 1, R Walton 1, M D Morgan 1
PMCID: PMC474893  PMID: 7570432

Abstract

BACKGROUND--In normal subjects treadmill exercise usually produces the greatest maximal oxygen consumption (VO2max). This may not be true for patients with severe chronic obstructive pulmonary disease (COPD) in whom bicycle exercise, which offers support for the shoulder girdle, may produce a higher oxygen consumption than treadmill exercise. The aim of this study was to determine which mode of exercise produced the greatest oxygen consumption in patients with severe COPD. METHODS--Eight patients with severe COPD (forced expiratory volume in one second (FEV1) more than three standardised residuals below predicted) exercised to a symptom limited maximum on a bicycle and on a treadmill on separate days. The workload on the bicycle wa increased by 10 watts each minute, and the treadmill gradient was increased by 2.5% alternate minutes whilst the speed remained constant. Measurements of oxygen consumption (VO2), ventilation (VE), heart rate, and oxygen saturation were made, and capillary blood gases were measured before and immediately after exercise. Lactate concentration was measured before and four minutes after exercise. RESULTS--There were no differences at peak exercise between the two forms of exercise for VO2 (median 11.7 and 12.2 ml/min/kg for bicycle and treadmill, respectively), for VE (median 26.6 and 25.0 l/min, respectively), and for heart rate (median 119 and 115 beats/min, respectively). The median lactate levels after bicycle exercise were higher than those after the treadmill (2.42 v 0.94 mmol/l). CONCLUSIONS--Although only a small number of patients was studied and individual variability was large, there was no clear difference between the two forms of exercise. Regular bicycle exercise was unfamiliar to this group of patients and generated the greatest lactate response. The results do not support the hypothesis that bicycle exercise will produce a better performance in patients with severe COPD, but the two modes of exercise cannot be used interchangeably.

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Selected References

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  1. Bland J. M., Altman D. G. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet. 1986 Feb 8;1(8476):307–310. [PubMed] [Google Scholar]
  2. Borg G. A. Psychophysical bases of perceived exertion. Med Sci Sports Exerc. 1982;14(5):377–381. [PubMed] [Google Scholar]
  3. Brown S. E., Fischer C. E., Stansbury D. W., Light R. W. Reproducibility of VO2max in patients with chronic air-flow obstruction. Am Rev Respir Dis. 1985 Mar;131(3):435–438. doi: 10.1164/arrd.1985.131.3.435. [DOI] [PubMed] [Google Scholar]
  4. Cockcroft A., Beaumont A., Adams L., Guz A. Arterial oxygen desaturation during treadmill and bicycle exercise in patients with chronic obstructive airways disease. Clin Sci (Lond) 1985 Mar;68(3):327–332. doi: 10.1042/cs0680327. [DOI] [PubMed] [Google Scholar]
  5. Criner G. J., Celli B. R. Effect of unsupported arm exercise on ventilatory muscle recruitment in patients with severe chronic airflow obstruction. Am Rev Respir Dis. 1988 Oct;138(4):856–861. doi: 10.1164/ajrccm/138.4.856. [DOI] [PubMed] [Google Scholar]
  6. Dillard T. A., Piantadosi S., Rajagopal K. R. Prediction of ventilation at maximal exercise in chronic air-flow obstruction. Am Rev Respir Dis. 1985 Aug;132(2):230–235. doi: 10.1164/arrd.1985.132.2.230. [DOI] [PubMed] [Google Scholar]
  7. Dillard T. A. Ventilatory limitation of exercise. Prediction in COPD. Chest. 1987 Aug;92(2):195–196. doi: 10.1378/chest.92.2.195. [DOI] [PubMed] [Google Scholar]
  8. Killian K. J., Leblanc P., Martin D. H., Summers E., Jones N. L., Campbell E. J. Exercise capacity and ventilatory, circulatory, and symptom limitation in patients with chronic airflow limitation. Am Rev Respir Dis. 1992 Oct;146(4):935–940. doi: 10.1164/ajrccm/146.4.935. [DOI] [PubMed] [Google Scholar]
  9. Maughan R. J. A simple, rapid method for the determination of glucose, lactate, pyruvate, alanine, 3-hydroxybutyrate and acetoacetate on a single 20-mul blood sample. Clin Chim Acta. 1982 Jul 1;122(2):231–240. doi: 10.1016/0009-8981(82)90282-0. [DOI] [PubMed] [Google Scholar]
  10. Shuey C. B., Jr, Pierce A. K., Johnson R. L., Jr An evaluation of exercise tests in chronic obstructive lung disease. J Appl Physiol. 1969 Aug;27(2):256–261. doi: 10.1152/jappl.1969.27.2.256. [DOI] [PubMed] [Google Scholar]
  11. Sue D. Y., Wasserman K., Moricca R. B., Casaburi R. Metabolic acidosis during exercise in patients with chronic obstructive pulmonary disease. Use of the V-slope method for anaerobic threshold determination. Chest. 1988 Nov;94(5):931–938. doi: 10.1378/chest.94.5.931. [DOI] [PubMed] [Google Scholar]

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