Inclusion Criteria:  Healthy volunteers: Person who has given oral consent man or woman 18 years or older a person who is able to understand simple orders, instructions for locomotion person living within a maximum radius of 50 km from the investigation site  Patients (in addition to the above):  persons who have had a stroke of any origin in the last 6 months person included in a rehabilitation protocol  Exclusion Criteria:  persons who are not affiliated to national health insurance persons subject to a legal protection measure (guardianship) persons who are subject to a legal protection measure pregnant women adult unable to express consent subject with a disarticulated hip Subjects with diseases or disabilities that have an impact on walking other than those related to the stroke.