Inclusion Criteria:  Age > 50 years Sedentary condition (<150 minutes of physical activity per week) Medical stability Mini Mental State Evauation > 22 Walking independently with or without assistance MiniBESTest > 20/28 For individuals with stroke: chronic post-stroke condition.  Exclusion Criteria:  Refusal to participate; Person with other conditions affecting independent walking; Contraindications to prolonged standing; Pain greater than 4/10 on the NRS; Concomitant pathologies that may interfere with the results; Inability to follow the study procedure (cognitive disorders, dementia, psychological disorders, language problems...).