Limiting Factors in Walking Performance of Subjects With COPD.
INTRODUCTION: Exercise intolerance is the most predominant symptom in patients with COPD. Nevertheless, it is unclear whether walking economy and gait variability are altered in these patients. Thus, our main objective was to compare the cost of transport and gait variability as a function of speed,...
| Published in: | Respiratory Care Vol. 63; no. 3; pp. 301 - 311 |
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| Main Authors: | , , , , , , |
| Format: | research tables/charts Journal Article |
| Published: |
Mary Ann Liebert, Inc.
Mar2018
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=128238633&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 128238633 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00201324 4GG jtl: Respiratory Care issn: 00201324 maglogo: N pubinfo: dt: Mar2018 vid: 63 iid: 3 pid: 1365 pub: Mary Ann Liebert, Inc. place: New Rochelle, New York artinfo: ui: 128238633 128238633 128238633 10.4187/respcare.05768 128238633 ppf: 301 ppct: 10 formats: fmt: @attributes: type: P tig: atl: Limiting Factors in Walking Performance of Subjects With COPD. aug: au: Sanseverino, Marcela Alves Pecchiari, Matteo Bona, Renata Luisa Berton, Danilo Cortozi de Queiroz, Francisco Busolli Gruet, Mathieu Peyré-Tartaruga, Leonardo A. affil: Pathophysiology and Pulmonary Function Laboratory of Clinical Hospital of Porto Alegre sug: subj: Pulmonary Disease, Chronic Obstructive Complications Walking Exercise Tolerance Gait Analysis Human Descriptive Statistics Forced Expiratory Volume Treadmills Oxygen Consumption Dyspnea Muscle Fatigue P-Value Pulmonary Disease, Chronic Obstructive Psychosocial Factors Quality of Life Vital Capacity Cross Sectional Studies Brazil Spirometry Exercise Test, Cardiopulmonary Data Analysis Software Post Hoc Analysis Unpaired T-Tests Friedman Test Mann-Whitney U Test Pearson's Correlation Coefficient Spearman's Rank Correlation Coefficient Linear Regression Male Female Aged Middle Age Aged: 65+ years Middle Aged: 45-64 years Male Female ab: INTRODUCTION: Exercise intolerance is the most predominant symptom in patients with COPD. Nevertheless, it is unclear whether walking economy and gait variability are altered in these patients. Thus, our main objective was to compare the cost of transport and gait variability as a function of speed, including the self-selected walking speed, in subjects with COPD relative to healthy subjects. METHODS: 22 subjects, 11 with COPD (FEV1 = 45 ± 17% of predicted) and 11 age- and sex-matched healthy subjects undertook an evaluation that involved walking on a treadmill at 6 speeds (at 3.2 km/h, at a self-selected walking speed, and at 2 speeds below and 2 speeds above the self-selected walking speed) and measuring the cost of transport (the oxygen consumption normalized by mass and distance), gait variability, perceived dyspnea, and leg fatigue. RESULTS: In subjects with COPD, the cost of transport decreased with increasing walking speed, contrary to healthy subjects, who presented a minimum at the self-selected walking speed. No difference was found in cost of transport between the experimental groups at the same absolute velocity (P = .62). In subjects with COPD, dyspnea sensation rose above the self-selected walking speed, doubling at the maximal walking velocity (P=.03), and gait variability was higher at low speeds. CONCLUSION: Subjects with COPD choose their walking speed so as to keep the dyspnea sensation tolerable and to keep gait variability and cost of transport at an acceptable level. These outcomes suggest that interventions acting on dyspnea and gait pattern may increase patients' self-selected walking speed and improve their quality of life. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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