Clinical Research Directory

Inclusion Criteria: * The subject is an adult, man or woman (18 years old or more), * Subjects affiliated or eligible to a social security system, * Subjects having expressed their consent to take part in the study. * Two subsets of patients will be included in the study : * Hypertensive patient * Patient having sleep apnea or COPD (Chronic obstructive pulmonary disease) Exclusion Criteria: * Minors under 18 years old, * Subject is pregnant, * Subjects having a pacemaker or an ICD (Implantable cardioverter defibrillator), * Subjects having refused to give their consent, * Vulnerable subjects according to the French regulation in force: * Individuals deprived of liberty by a court, medical or administrative order, * Individuals legally protected or unable to express their consent to take part in the study, * Individuals unaffiliated to or not beneficiary of a social security system, * Individuals who fit in multiple categories above, * Individuals linguistically or mentally unable to express their consent, * Individuals having a lower limb amputation bigger than toes, * Individuals not able to stand still for a few minutes.