The Effects of Compression Stockings on Pressure Parameters in Patients With Chronic Venous Insufficiency

Inclusion Criteria: * The participant must have given his/her informed and signed consent * The participant must be insured or beneficiary of a health insurance plan Inclusion criteria for patients in the venous insufficiency group: * CEAP (Clinical-Etiology-Anatomy-Pathophysiology) Classification : C1S, C3 or C5 Inclusion criteria for healthy volunteers * general good health * subgroups including: * sedentary volunteers (\< 2hours of physical activity per week) * active volunteers (between 2 and 6 hours of physical activity per week) * athletic volunteers (over 6 hours of physical activity per week for at least 1 year) Exclusion Criteria: * The participant is participating in another study, except the "volumetric" counterpart to the present study * The participant is in an exclusion period determined by a previous study * The participant is under judicial protection, under tutorship or curatorship * The participant refuses to sign the consent * It is impossible to correctly inform the participant * The participant is pregnant, parturient, or breastfeeding * Arterial vascular disease, heart, lymph, renal, hepatic, oncologic, metabolic or endocrine or any other condition that may cause or exaggerate edema Exclusion criteria for healthy volunteers: * Risk for abnormal bleeding (hemophilia, anticoagulation or antiplatelet) * Taking diuretics or corticoids