Postural Control in Chronic Obstructive Pulmonary Disease

This observational study is based on the analyses of data (center of pressure displacement) recorded during the first visit of NEUROTIGUE study (NCT04028973). Center of pressure (COP) displacement were recorded during 60s of static balance in four conditions (random order) : * Eyes open without cognitive task * Eyes open with cognitive task * Eyes closed without cognitive task * Eyes closed with cognitive task The cognitive task used was a working memory task : the 1-back task. COP displacement will be assess using a conjunction of parameters to provide a comprehensive understanding of postural control (e.g., amplitude, standard deviation, non-linear approaches).