The Role of Physical Activity for Acute Exacerbations of COPD

The investigators plan to study the association between physical activity, malnutrition and sarcopenia and the occurrence of acute exacerbations of COPD / the evolution of the COPD assessment test (CAT) over 1 year in a telehealthcare cohort of patients with COPD. The investigators hypothesize that malnutrition and/or sarcopenia at baseline and a decline in the fat-free mass index over time is associated with an increased rate of acute exacerbations of COPD and an increased CAT score meaning a higher risk for mortality, morbidity and impairment of quality of life.