Summary
The purpose of this study was to evaluate the usefulness of ratings of perceived exertion (RPE) as an indicator of exercise intensity in patients with chronic obstructive pulmonary disease (COPD). The subjects were ten male patients with COPD, whose mean forced expiratory volume in 1 s was 1.091, SD 0.41, and ten healthy middle-aged men. Ramp incremental exercise on a cycle-ergometer was performed and RPE was determined by the Borg 15-point scale. The absolute oxygen uptake at each RPE was significantly greater in the healthy subjects than in the patients with COPD. However, oxygen uptake calculated as a percentage of maximal at any RPE did not differ significantly between the two groups. Arterial blood lactate concentration at points 15 to 19 on the RPE scale was increased in healthy subjects (P<0.05–P<0.001), while the dyspnoea index at points 11 to 19 on the RPE scale was higher in patients with COPD (P<0.05–P<0.001). The main complaints on stopping exercise were dyspnoea in the patients with COPD and fatigue in the healthy subjects. Although the nature of RPE may have been different in the two groups, RPE could be a possible indicator of exercise intensity when physicians prescribe exercise to patients with COPD.
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Chida, M., Inase, N., Ichioka, M. et al. Ratings of perceived exertion in chronic obstructive pulmonary disease — a possible indicator for exercise training in patients with this disease. Europ. J. Appl. Physiol. 62, 390–393 (1991). https://doi.org/10.1007/BF00626608
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DOI: https://doi.org/10.1007/BF00626608