Comparing peak and submaximal cardiorespiratory responses during field walking tests with incremental cycle ergometry in COPD
Background and objective: Field and laboratory-based tests are used to measure exercise capacity in people with COPD. A comparison of the cardiorespiratory responses to field tests, referenced to a laboratory test, is needed to appreciate the relative physiological demands. We sought to compare peak...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Wiley-Blackwell Publishing Asia
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/41367 |
| _version_ | 1848756126124867584 |
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| author | Hill, Kylie Dolmage, T. Woon, L. Coutts, D. Goldstein, R. Brooks, D. |
| author_facet | Hill, Kylie Dolmage, T. Woon, L. Coutts, D. Goldstein, R. Brooks, D. |
| author_sort | Hill, Kylie |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Background and objective: Field and laboratory-based tests are used to measure exercise capacity in people with COPD. A comparison of the cardiorespiratory responses to field tests, referenced to a laboratory test, is needed to appreciate the relative physiological demands. We sought to compare peak and submaximal cardiorespiratory responses to the 6-min walk test, incremental shuttle walk test and endurance shuttle walk test with a ramp cycle ergometer test (CET) in patients with COPD. Methods: Twenty-four participants (FEV1 50 ± 14%; 66.5 ± 7.7 years; 15 men) completed four sessions, separated by ≥24 h. During an individual session, participants completed either two 6-min walk tests, incremental shuttle walk tests, endurance shuttle walk tests using standardized protocols, or a single CET, wearing a portable gas analysis unit (Cosmed K4b2) which included measures of heart rate and arterial oxygen saturation (SpO2). Results: Between tests, no difference was observed in the peak rate of oxygen uptake (F3,69 = 1.2; P = 0.31), end-test heart rate (F2,50 = 0.6; P = 0.58) or tidal volume (F3,69 = 1.5; P = 0.21). Compared with all walking tests, the CET elicited a higher peak rate of carbon dioxide output (1173 ± 350 mL/min; F3,62 = 4.8; P = 0.006), minute ventilation (48 ± 17 L/min; F3,69 = 10.2; P < 0.001) and a higher end-test SpO2 (95 ± 4%; F3,63 = 24.9; P < 0.001). Conclusions: In patients with moderate COPD, field walking tests elicited a similar peak rate of oxygen uptake and heart rate as a CET, demonstrating that both self- and externally paced walking tests progress to high intensities. |
| first_indexed | 2025-11-14T09:07:14Z |
| format | Journal Article |
| id | curtin-20.500.11937-41367 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:07:14Z |
| publishDate | 2012 |
| publisher | Wiley-Blackwell Publishing Asia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-413672017-09-13T16:03:35Z Comparing peak and submaximal cardiorespiratory responses during field walking tests with incremental cycle ergometry in COPD Hill, Kylie Dolmage, T. Woon, L. Coutts, D. Goldstein, R. Brooks, D. Background and objective: Field and laboratory-based tests are used to measure exercise capacity in people with COPD. A comparison of the cardiorespiratory responses to field tests, referenced to a laboratory test, is needed to appreciate the relative physiological demands. We sought to compare peak and submaximal cardiorespiratory responses to the 6-min walk test, incremental shuttle walk test and endurance shuttle walk test with a ramp cycle ergometer test (CET) in patients with COPD. Methods: Twenty-four participants (FEV1 50 ± 14%; 66.5 ± 7.7 years; 15 men) completed four sessions, separated by ≥24 h. During an individual session, participants completed either two 6-min walk tests, incremental shuttle walk tests, endurance shuttle walk tests using standardized protocols, or a single CET, wearing a portable gas analysis unit (Cosmed K4b2) which included measures of heart rate and arterial oxygen saturation (SpO2). Results: Between tests, no difference was observed in the peak rate of oxygen uptake (F3,69 = 1.2; P = 0.31), end-test heart rate (F2,50 = 0.6; P = 0.58) or tidal volume (F3,69 = 1.5; P = 0.21). Compared with all walking tests, the CET elicited a higher peak rate of carbon dioxide output (1173 ± 350 mL/min; F3,62 = 4.8; P = 0.006), minute ventilation (48 ± 17 L/min; F3,69 = 10.2; P < 0.001) and a higher end-test SpO2 (95 ± 4%; F3,63 = 24.9; P < 0.001). Conclusions: In patients with moderate COPD, field walking tests elicited a similar peak rate of oxygen uptake and heart rate as a CET, demonstrating that both self- and externally paced walking tests progress to high intensities. 2012 Journal Article http://hdl.handle.net/20.500.11937/41367 10.1111/j.1440-1843.2011.02089.x Wiley-Blackwell Publishing Asia fulltext |
| spellingShingle | Hill, Kylie Dolmage, T. Woon, L. Coutts, D. Goldstein, R. Brooks, D. Comparing peak and submaximal cardiorespiratory responses during field walking tests with incremental cycle ergometry in COPD |
| title | Comparing peak and submaximal cardiorespiratory responses during field walking tests with incremental cycle ergometry in COPD |
| title_full | Comparing peak and submaximal cardiorespiratory responses during field walking tests with incremental cycle ergometry in COPD |
| title_fullStr | Comparing peak and submaximal cardiorespiratory responses during field walking tests with incremental cycle ergometry in COPD |
| title_full_unstemmed | Comparing peak and submaximal cardiorespiratory responses during field walking tests with incremental cycle ergometry in COPD |
| title_short | Comparing peak and submaximal cardiorespiratory responses during field walking tests with incremental cycle ergometry in COPD |
| title_sort | comparing peak and submaximal cardiorespiratory responses during field walking tests with incremental cycle ergometry in copd |
| url | http://hdl.handle.net/20.500.11937/41367 |