A new cardiopulmonary exercise testing with the Incremental Spot Marching Exercise Test in patients with chronic obstructive pulmonary disease: a pilot study
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Abstract
Background: Most of standard functional exercise tests involved mainly leg, which irrelevant to activities that involved arm and leg, functional problems of patients with chronic obstructive pulmonary disease (COPD). Thus, an arm-leg exercise test would be important to indicate the actual functional capacity in real life. Therefore, a new “Incremental Spot Marching Exercise Test” (ISMET) has been developed, where the subject marches on the spot with increasing workload (Stepping rate) and hip flexion to 70 degrees, while arms swing to at least 90 degrees.
Objective: To determine the cardiopulmonary responses and relationship between the responses and workload during ISMET.
Methods: A cross-sectional study was conducted in ten stable mild-moderate COPD, all male, age 64±5 years old. The ISMET began at 70 steps/min, increasing by 10 steps/min every 3 minutes until symptom limit. Heart rate (HR), tidal volume (VT), minute ventilation (VE) and Borg’s dyspnea score (RPB) were recorded at rest, during the last minute of each workload and at end exercise.
Results: At the end of the test, HR increased to 130±20 beats/min (83±22% HRmax), VT and VE increased to 1.48±0.25 L and 47.3±9.5 L/min, respectively. RPB increased to 4 (IQR 4, 5). There were correlations between workloads and HR, VT, VE, and RPB (r=0.866, 0.899, 0.920, and 0.861, respectively). All outcomes were significant (p<0.01).
Conclusion: ISMET provides a moderate intensity of exercise to reach peak capacity. The workload is highly correlated with cardiopulmonary responses. ISMET is simple and safe and may be suitable as an exercise test that requires further study in COPD.COPD.
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References
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