Comparison of endurance shuttle walk test and cycle endurance test in pulmonary rehabilitation program

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Introduction: Endurance tests are commonly used to assess endurance capacity and improvement of it in patients with chronic pulmonary diseases who are attending pulmonary rehabilitation programs (PR). The aim of our study was to determine, whether endurance time after PR measured with endurance shuttle walk test (ESWT) and cycle endurance test (CET) improves and to compare the results of both tests to assess correlations. Methods: We included patients who successfully concluded our 4 week long inpatient PR. ESWT and CET were performed before and after PR. Pearsons correlation was used to assess relationships. Results: 39 patients (34 COPD, 4 asthma, 1 pulmonary fibrosis) were included in the study (mean age 63.7 ± 6.8 years, 51,3 % male), mean FEV1 1301ml±644ml (46% predicted). Mean ESWT time before PR was 282±214s and after PR 465±313s. Endurance time improved statistically significantly (p<0.01). Average endurance time in CET before PR was 418±299 s and after PR 772±407 s (p < 0.001). We detected a moderate positive correlation between ESWT and CET time before PR (r=0.401, p=0.01). We found no correlation in improvement of times between both tests (r= 0.129, p=0.43 ). Conclusion: We found an improvement of endurance capacity after completion of PR measured with both tests. We found a moderate correlation before PR and no significant correlation between the two tests after PR. We assume that tests don’t correlate because they measure different type of activity (cycling vs. walking) which don’t improve equally after PR with high variability of individual improvement.

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