Purpose: 

Incremental shuttle walk tests (ISWTs) are routinely conducted as outcome measures in pulmonary rehabilitation (PR) assessments and in clinical trials; however, there is a paucity of data describing the impact of simply conducting an exercise test and the change produced in the perceived ability of the individual to perform exercise subsequently, which may in turn influence therapy and study outcomes.

Methods: 

We conducted a prospective observational cohort study at Glenfield Hospital, Leicester, UK (University Hospitals of Leicester NHS Trust). At initial PR assessment, we asked patients pre- and post-practice ISWT to report confidence in three areas (walking at home [Q1], managing breathlessness [Q2], and performing an ISWT [Q3]) based on a visual analog scale (0-10).

Results: 

A total of 100 patients with chronic respiratory disease (age 68.0 ± 10.3 yr, male 49%, chronic obstructive pulmonary disease 63%, Medical Research Council 2-5) completed visual analog scale confidence questions pre- and post-practice ISWT. Confidence in all questions improved after a practice ISWT (all P < .01 Wilcoxon signed rank). A statistically significant improvement in ISWT distance was noted (practice ISWT 207.3 ± 132.7 m to second ISWT 227.4 ± 142.0 m, mean difference = 20.1 m). No association was found between changes in confidence and changes between walk 1 and walk 2 (r² = [Q1] −0.04, [Q2] −0.09, [Q3] 0.04, P >.05).

Conclusions: 

Confidence increased in all areas post-practice ISWT, but this was not related to changes in performance. However, this change may be an important consideration when designing research trials as exercise behaviors (eg, walking at home) may be affected by conducting baseline exercise tests.

中文翻译：

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基线运动测试对执行后续增量往返步行测试、在家步行和管理呼吸困难的信心的影响

目的： 

增量穿梭步行测试（ISWT）通常作为肺康复（PR）评估和临床试验中的结果测量进行；然而，缺乏数据来描述简单地进行运动测试的影响以及个人随后进行运动的感知能力所产生的变化，这反过来可能会影响治疗和研究结果。

方法： 

我们在英国莱斯特格伦菲尔德医院（莱斯特 NHS 信托大学医院）进行了一项前瞻性观察队列研究。在最初的 PR 评估中，我们要求患者在 ISWT 练习前和练习后根据视觉模拟量表报告对三个方面（在家行走 [Q1]、管理呼吸困难 [Q2] 和执行 ISWT [Q3]）的信心（ 0-10）。

结果： 

共有 100 名慢性呼吸道疾病患者（年龄 68.0 ± 10.3 岁，男性 49%，慢性阻塞性肺疾病 63%，医学研究委员会 2-5）在 ISWT 练习前和练习后完成了视觉模拟量表置信度问题。经过 ISWT 练习后，对所有问题的信心都有所提高（所有P < .01 Wilcoxon 签名等级）。ISWT 距离在统计学上显着改善（练习 ISWT 207.3 ± 132.7 m 到第二次 ISWT 227.4 ± 142.0 m，平均差 = 20.1 m）。未发现置信度变化与步行 1 和步行 2 之间的变化之间存在关联（r ² = [Q1] -0.04，[Q2] -0.09，[Q3] 0.04，P >.05）。

结论： 

练习 ISWT 后，各方面的信心都有所提高，但这与表现的变化无关。然而，在设计研究试验时，这种变化可能是一个重要的考虑因素，因为进行基线运动测试可能会影响运动行为（例如，在家行走）。