Comparison of Cardiopulmonary Responses During 2 Incremental Step Tests in Subjects With COPD.
BACKGROUND: It is well established that the work rate increment size affects the duration of test and physiological responses to exercise during cycling in patients with COPD. However, this has never been tested for incremental step tests. OBJECTIVE: To compare the exercise tolerance time, cardiopul...
| Publicado en: | Respiratory Care Vol. 57; no. 11; pp. 1920 - 1927 |
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| Autores principales: | , , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Mary Ann Liebert, Inc.
Nov2012
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=108109776&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 108109776 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00201324 4GG jtl: Respiratory Care issn: 00201324 maglogo: N pubinfo: dt: Nov2012 vid: 57 iid: 11 pid: 1365 pub: Mary Ann Liebert, Inc. place: New Rochelle, New York artinfo: ui: 108109776 83097658 10.4187/respcare.01742 NLM22709990 108109776 ppf: 1920 ppct: 7 formats: fmt: @attributes: type: P tig: atl: Comparison of Cardiopulmonary Responses During 2 Incremental Step Tests in Subjects With COPD. aug: au: Silva de Andrade, Carlos Henrique de Camargo, Anderson Alves de Castro, Brenda Pitman Malaguti, Carla Dal Corso, Simone affil: Clinical Exercise Physiology Unit, Postgraduate Program in Rehabilitation Sciences, Nove de Julho University, São Paulo, Brazil sug: subj: Pulmonary Disease, Chronic Obstructive Physiopathology Exercise Tolerance Exercise Test, Cardiopulmonary Methods Pulmonary Gas Exchange Human Clinical Assessment Tools Comparative Studies Descriptive Statistics Prospective Studies Middle Age Aged Aged, 80 and Over Cross Sectional Studies Heart Rate Oxygen Saturation Two-Way Analysis of Variance Paired T-Tests Pearson's Correlation Coefficient Spearman's Rank Correlation Coefficient Data Analysis Software Male Female Funding Source Middle Aged: 45-64 years Aged: 65+ years Aged, 80 & over Male Female ab: BACKGROUND: It is well established that the work rate increment size affects the duration of test and physiological responses to exercise during cycling in patients with COPD. However, this has never been tested for incremental step tests. OBJECTIVE: To compare the exercise tolerance time, cardiopulmonary stress, and perception of effort between the Chester step test (CST) and a modified incremental step test (MIST). METHODS: Thirty-two subjects with COPD (FEV1 50 ± 15% of predicted) were randomized to perform the CST and MIST on the same day, an hour apart, on a single step (20 cm high). During tests, pulmonary gas exchange was measured continuously by a portable metabolic system. RESULTS: CST had shorter duration and also lower number of steps, in comparison with MIST. However, similar cardiopulmonary responses were observed at exercise peak: oxygen uptake (V̇O2) 1.22 ± 0.59 L/min vs 1.24 ± 0.55 L/min, minute ventilation (V̇E) 30.8 ± 12.7 L/min vs 30.0 ± 11.7 L/min, heart rate 86 ± 13 beats/min vs 85 ± 13 beats/min, and SpO2 87 ± 7% vs 87 ± 6%. Dyspnea and leg fatigue scores when correcting for exercise duration were higher for CST. CONCLUSIONS: The slower the work rate increment during step test, the higher the exercise tolerance. Regardless of the work rate increment, cardiopulmonary stress and exertion effort at peak exercise were equivalent between tests. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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