In patients with COPD strength and endurance exercise capacity are impaired.
Exercise capacity may be affected by many factors such as ventilatory limitation,dynamic hyperinflation and diminished oxygen uptake in the lung
In addition, impaired exercise capacity could be caused by factors outside the lung, such as early lactate production,2,6e8 muscle dysfunction1 and cardiovascular
deconditioning (e.g. higher heart rate and lower stroke volume during exercise), which may at least be partially induced by sedentary lifestyle due to dyspnea