With the limitation of
the tidal volume increase during exercise, dynamic
hyperinflation results in restrictive mechanical constraints
which, in the extreme, can lead to alveolar
hypoventilation during exercise. In patients with COPD,
breathing to higher lung volumes increases the total
respiratory work, and thus potentiates the perception of
breathlessness, which favors a decrease in physical
activity.
With the limitation ofthe tidal volume increase during exercise, dynamichyperinflation results in restrictive mechanical constraintswhich, in the extreme, can lead to alveolarhypoventilation during exercise. In patients with COPD,breathing to higher lung volumes increases the totalrespiratory work, and thus potentiates the perception ofbreathlessness, which favors a decrease in physicalactivity.
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