Teste da caminhada de seis minutos na doença respiratória crônica: simples de realizar, nem sempre fácil de interpretar

Neder, J. Alberto

doi:10.1590/s1806-37132011000100001

Cited by 9 publications

(2 citation statements)

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“…In contrast, patients with reduced functional limitation usually reach levels close to the maximum overload on the first test, reducing the possibility of improving performance on the second test. 33 In this study, in subjects without poor exercise tolerance, the number of steps tended to increase on the retest, and, in the correlation analysis, the greater the number of steps on the 6MST 1 , the smaller the change on the 6MST 2 . Therefore, in patients without poor exercise tolerance, a second test may not be necessary.…”

Section: Discussionmentioning

confidence: 50%

Reproducibility of the 6-Min Step Test in Subjects With COPD

et al. 2020

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BACKGROUND: Test-retest reproducibility of the 6-min step test (6MST) is controversial in patients with COPD because the decision to perform a second test is influenced by interruptions, physiological overload, and the patient's exercise tolerance. The aim of this study was to analyze the reproducibility of performance on the 6MST (ie, number of steps climbed and interruptions) and physiological variables in subjects with COPD, with and without poor exercise tolerance, and with and without interruptions during the test. METHODS: Subjects performed 2 6MST (6MST 1 , 6MST 2) with a minimum of 30 min rest between tests. Physiological variables were assessed with a gas analyzer. Subjects who performed^78 steps in the 6MST 1 and^86 steps in the test with the higher number of steps performed (6MST BEST) were considered to have poor exercise tolerance. Subjects were also stratified according to those who interrupted the 6MST BEST and those who did not interrupt the 6MST BEST. RESULTS: 40 subjects (31 men; FEV 1 percent of predicted 5 50.4 6 13.5) participated in the study. The number of steps, interruptions, and physiological variables showed moderate to high reliability (intraclass correlation coefficient: 0.70-0.99, P < .001). Thirty-one (77.5%) subjects had a better performance during 6MST 2 than 6MST 1 (mean difference: 4.65 6 5.59, P < .001). Although the number of times subjects were interrupted was similar between the 2 tests (P 5 .66), the duration of these interruptions was shorter during 6MST 2 (mean difference:-0.12 6 0.39 s, P 5 .040). The difference in the number of steps (6MST 2 2 6MST 1) did not differ between subjects who performed^78 steps (mean difference: 5.64 6 5.32 steps; 10.3%; P < 0.001) and 6 79 steps (3.00 6 5.82 steps; 6.13%; P 5 0.08) on the 6MST 1 (P 5 0.15) and between subjects who performed 86 steps (5.39 6 5.14 steps; 9.39%; P < 0.001) and 6 87 steps (2.92 6 6.43 steps; 2.74%; P 5 0.14) steps on the 6MST BEST (P 5 0.20). CONCLUSIONS: Performance and physiological variables in the 6MST were reproducible, and a second test did not impose greater physiological overload. Two tests were essential for patients with poor exercise tolerance. Key words: COPD; activities of daily living; data accuracy; exercise; oxygen consumption; reproducibility of results.

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Section: Discussionmentioning

confidence: 50%

Reproducibility of the 6-Min Step Test in Subjects With COPD

et al. 2020

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“…The 6MWT provides indicators of functional capacity, gas exchange integrity, and sensory stress34 ) . In the present work, we found different 6MWT distances between the groups (552 m for the healthy group, 483.5 m for the group with controlled acromegaly, and 460 m for the group with active acromegaly), but without statistical significance.…”

Section: Discussionmentioning

confidence: 99%

On the Functional Capacity and Quality of Life of Patients with Acromegaly: Are They Candidates for Rehabilitation Programs?

et al. 2013

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[Purpose] This study compared patients having active acromegaly with those having controlled acromegaly in terms of peripheral muscle strength, body composition, and functional capacity. We also examined the associations between these measures. [Methods] A total of 14 patients with active acromegaly, 12 patients with controlled acromegaly, and 12 healthy controls were subjected to isometric dynamometry, surface electromyography, electrical bioimpedance, and a six-minute walk test. [Results] The active acromegaly group exhibited significantly more fat-free mass than the control group. With respect to the peripheral muscle performance, the controlled acromegaly group presented a significantly lower electromyographic median frequency than the control group. The quadriceps maximum strength was significantly lower in the controlled acromegaly group than in the control group. The fat-free mass was significantly correlated with the quadriceps maximum strength. The global scores of the Acromegaly Quality of Life Questionnaire were significantly correlated with the six-minute walk distance. [Conclusion] Patients with acromegaly have more fat-free mass, less peripheral muscle strength, and greater fatigability than healthy control subjects. These findings depend on the degree of hormonal control. In acromegalic patients, peripheral muscle strength is related to body composition, and functional capacity is correlated with quality of life.

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