Differences between remaining ability and loss of capacity in maximum aerobic impairment

Neder, J. Alberto; Nery, Luíz Eduardo; Bagatin, Ericson; Lucas, Sandra Regina Rodrigues; Anção, Meide Silva; Sue, Darryl Y.

doi:10.1590/s0100-879x1998000500006

Cited by 18 publications

(18 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We considered a reduced aerobic capacity a peak V O 2 Ͻ 70% of predicted. 24 We compared the measured peak V O 2 during cycling to the estimated peak V O 2 in the Chester step test. For this part of the study we analyzed 6 patients, because to estimate V O 2 from the Chester step test it is necessary to complete at least the first 2 stages of the Chester step test and the subject must be Յ 70 years old.…”

Section: Cardiopulmonary Exercise Testingmentioning

confidence: 99%

Chester Step Test in Patients With COPD: Reliability and Correlation With Pulmonary Function Test Results

et al. 2011

View full text Add to dashboard Cite

BACKGROUND:The 5-stage Chester step test assesses aerobic capacity in healthy subjects. It has not been tested in patients with COPD. OBJECTIVE: To determine the reliability of the Chester step test in patients with COPD and correlation with pulmonary function test and exercise test results. METHODS: Thirty-two patients (mean ؎ SD FEV 1 46 ؎ 15% of predicted) undertook 2 Chester step tests and two 6-min walk tests, on different days, in random order. A subgroup of 11 patients performed incremental cycle ergometry. RESULTS: Thirty-one patients performed stage 1 of the Chester step test. Nineteen patients performed stage 2 of the Chester step test. The number of steps was highly reproducible: 66 ؎ 41 steps vs 68 ؎ 41 steps. There was no difference in heart rate or S pO 2 between the 2 Chester step tests at the peak of exercise or at the end of each stage. There was a significant correlation between number of steps and FEV 1 (r ‫؍‬ 0.43, P ‫؍‬ .02), and 6-min walk distance (r ‫؍‬ 0.60, P ‫؍‬ .001). Heart rate increased according to advanced stages of the Chester step test, up to 81 ؎ 13% of predicted. There was a significant correlation between number of steps and peak heart rate (r ‫؍‬ 0.55, P ‫؍‬ .001). In the 11 patients who performed the incremental cycling test there was a significant correlation between number of steps and peak work load (r ‫؍‬ 0.69, P ‫؍‬ .02). In the 6 patients in whom oxygen uptake could be estimated from the Chester step test, oxygen uptake was higher than that measured at the peak of the cycling test (30.8 ؎ 5.1 mL/kg/min vs 17.4 ؎ 4.5 mL/kg/min, respectively, P ‫؍‬ .001). CONCLUSIONS: Despite being highly reproducible, the Chester step test had a very short duration in patients with COPD. The number of steps incremented in each stage seems to be too large for these patients. An adaptation of the Chester step test should be considered for patients with COPD.

show abstract

Section: Cardiopulmonary Exercise Testingmentioning

confidence: 99%

Chester Step Test in Patients With COPD: Reliability and Correlation With Pulmonary Function Test Results

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Recently, Neder et al [57] proposed expressing disability using what they termed loss of aerobic capacity (V O 2 , % predicted) rather than remaining capacity (peak V O 2 ml/kg/min), in contrast with some of the ATS recommenIs ventilatory capacity during exercise reduced?…”

Section: Exercise Testing and Quantitation Of Impairmentmentioning

confidence: 99%

Evaluation of Impairment and Disability: The Role of Cardiopulmonary Exercise Testing

Sue¹

2002

Clinical Exercise Testing

View full text Add to dashboard Cite

Cardiopulmonary exercise testing has a strong physiological basis and well-documented clinical rationale for impairment evaluation. Both determination and quantitation of impairment are enhanced by exercise testing, notably because of the inadequacy of resting pulmonary function tests to predict exercise capacity, and both over-and underestimation of work capacity have been found. Furthermore, exercise arterial blood gases are very sensitive tests for subtle lung disease. Exercise testing can be especially useful in those with co-existing disorders or unsuspected cardiovascular disorders. Exercise testing is not indicated in those who lack complaints of exertional dyspnea or fatigue, and those with severe respiratory impairment (ATS criteria for impairment by FEV 1 or DLCO) also do not require exercise testing. Cardiopulmonary exercise testing can provide objective determination of exercise capacity, increased sensitivity for pulmonary gas exchange abnormalities, and the ability to identify unsuspected or unanticipated non-pulmonary causes of impairment.

show abstract

“…Recently, NEDER et al [24] proposed expressing exercise disability using V9O 2 ,max % pred rather than V9O 2 ,max in mL?kg…”

mentioning

confidence: 99%

Pulmonary function and exercise capacity in survivors of severe acute respiratory syndrome

Kc¹

2004

European Respiratory Journal

137

View full text Add to dashboard Cite

The aim of this study was to investigate pulmonary function and exercise capacity in a group of survivors of the severe acute respiratory syndrome (SARS).At 3 months after hospital discharge, 46 survivors of SARS underwent the following evaluation: spirometry, static lung volumes and carbon monoxide transfer factor (TL,CO). In total, 44 of these patients underwent cardiopulmonary exercise testing.No abnormalities were detected in the pulmonary function tests in 23 (50%) of the patients. Abnormalities of forced vital capacity (FVC), forced expiratory volume in one second (FEV1), FEV1/FVC and TL,CO were detected in seven (15%), 12 (26%), one (2%) and 18 (39%) patients, respectively. All of these abnormalities were mild except in one case. In 18 patients (41%), the maximum aerobic capacity was below the lower limit of the normal range. Breathing reserve was low in four patients and significant oxygen desaturation was detected in a further four patients. Comparison of the measured exercise capacity with resting pulmonary function tests showed many cases of discordance in impairment.In conclusion, pulmonary function defects were detected in half of the recovered severe acute respiratory syndrome patients 3 months after hospital discharge, but the impairment was mild in almost all cases. Many patients had reduced exercise capacity that cannot be accounted for by impairment of pulmonary function.

show abstract

Differences between remaining ability and loss of capacity in maximum aerobic impairment

Cited by 18 publications

References 12 publications

Chester Step Test in Patients With COPD: Reliability and Correlation With Pulmonary Function Test Results

Chester Step Test in Patients With COPD: Reliability and Correlation With Pulmonary Function Test Results

Evaluation of Impairment and Disability: The Role of Cardiopulmonary Exercise Testing

Pulmonary function and exercise capacity in survivors of severe acute respiratory syndrome

Contact Info

Product

Resources

About