Alternative strategies for exercise critical power estimation in patients with COPD

Alternative strategies for exercise critical power estimation in patients with COPD

Author Malaguti, C. Google Scholar
Nery, L. E. Google Scholar
Dal Corso, S. Google Scholar
De Fuccio, M. B. Google Scholar
Lerario, M. C. Google Scholar
Cendon, S. Google Scholar
Neder, J. A. Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Exercise critical power (CP) has been shown to represent the highest sustainable work rate (WR) in patients with chronic obstructive pulmonary disease ( COPD). Parameter estimation, however, depends on 4 high-intensity tests performed, on different days, to the limit of tolerance (T-lim). in order to establish a milder protocol that would be more suitable for disabled patients, we contrasted CP derived from 4, 3 and 2 tests (CP4, CP3 and CP2) in 8 males with moderate COPD. in addition, CP was calculated from 2 single-day tests performed on an inverse sequence (CP2AB and CP2BA): CP values within 5 W from CP4 were assumed as clinically-acceptable estimates. We found that [CP4-CP3] and [CP4-CP2] differences were within 5 W in 8 and 6 patients, respectively (95% confidence interval of the differences = -1.3 to 3.5 W and -11.5 to 6.5 W). There was a systematic decline on T-lim when an exercise bout was performed after a previous test on the same day (P < 0.05). Consequently, substantial differences were found between CP4 and any of the CP estimates obtained from single-day tests. in conclusion, clinically-acceptable estimates of CP can be obtained by using 3 or, in most circumstances, 2 constant WR tests in patients with moderate COPD-provided that they are not performed on the same day.
Keywords COPD
critical power
oxygen consumption
exercise capacity
Language English
Date 2006-01-01
Published in European Journal of Applied Physiology. New York: Springer, v. 96, n. 1, p. 59-65, 2006.
ISSN 1439-6319 (Sherpa/Romeo, impact factor)
Publisher Springer
Extent 59-65
Access rights Closed access
Type Article
Web of Science ID WOS:000233722300009

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