It is commonly held that the respiratory system has ample capacity relative to the demand for
maximal O2 and CO2 transport in healthy humans exercising near sea level. However, this …

The activities of daily living typically occur at metabolic rates below the maximum rate of
aerobic energy production. Such activity is characteristic of the nonsteady state, where …

The inability to engage in sustained physical activity is a common feature of chronic
obstructive pulmonary disease (COPD) and contributes importantly to the perception of poor …

From a functional point of view, there are three groups of respiratory muscles: the
diaphragm, the rib cage muscles and the abdominal muscles. Each group acts on the chest …

Background: Optoelectronic plethysmography (OEP) is a non-invasive motion capture
method to measure chest wall movements and estimate lung volumes. Objectives: To …

Introduction: Pulmonary rehabilitation (PR) is one of the core components in the
management of patients with chronic obstructive pulmonary disease (COPD). In order to …

No doubt dynamic hyperinflation and lack of oxidative capacity of skeletal muscles are
important causes of exercise limitation in COPD. O'Donnell and Webb and Debigaré and …

A decreased inspiratory capacity (IC)/total lung capacity (TLC) ratio is associated with
dynamic hyperinflation and decreased exercise capacity. The present authors hypothesised …

During dynamic exercise, the healthy pulmonary system faces several major challenges,
including decreases in mixed venous oxygen content and increases in mixed venous …

This review examines 18 studies published≥ 30 yrs ago. They show that the earliest
manifestation of chronic obstructive pulmonary disease (COPD) is an increase in residual …