Mechanisms of Physical Activity Limitation in Chronic Lung Diseases
Figure 4
Ventilatory and gas exchange responses during incremental exercise in chronic lung diseases. Typical exercise responses in COPD () interstitial lung disease (ILD: ●), PVD (■), and healthy age-matched subjects (- - - - - -) for (a) oxygen uptake (b) respiratory frequency (fR), and (c) arterial oxygen tension. Responses plotted as a function of oxygen uptake (), work rate, or tidal volume as a % of predicted vital capacity (VC). With permission from O’Donnell et al., 2007 [3–5].
