Respiratory Consequences of Mild-to-Moderate Obesity: Impact on Exercise Performance in Health and in Chronic Obstructive Pulmonary Disease
Figure 8
(a) Obese (OB) subjects with COPD (closed symbols) had a rightward shift in the dyspnea/ventilation relationship compared with normal weight (NW) subjects with COPD (open symbols). At an isoventilation () of 25 L/min (vertical line with arrow), dyspnea intensity was 1.2 versus 2.4 Borg units in OB versus NW (). (b) In both groups, the relationship between dyspnea intensity and inspiratory reserve volume (IRV) (standardized as a % of predicted TLC) were superimposed. At iso, OB subjects were on the flatter part of the dyspnea/IRV relation while NW subjects were on the steeper portion of the curve. Values are means ± SEM. From Ora et al. [13].
