Clinimetric Properties of Muscle Mass and Stiffness Measurements of the Quadriceps in Patients With COPD

"Patients will undergo a pulmonary rehabilitation (PR) programme.~On day 1, perimetry and ShearWave measurements of the quadriceps muscle will be provided. Supplementary assessments of quadriceps thickness, quadriceps strength with a handheld dynamometry, lean body mass (bioelectrical impedance), constant work-rate endurance test and HAD questionnaire will also be provided on day 1.~The same measurements and questionnaire will be provided on the last day of the patient in the PR programme."