Virtual Reality Applied to the Evaluation and Rehabilitation of Locomotion - Study of Tolerance in the Lower Limb Amputee

Inclusion Criteria: Healthy volunteers: * Person who has given oral consent * Male or female over the age of majority, \< 80 years * Person able to understand simple commands, conditioning instructions Amputee patients: * Person who has given oral consent * Male or female over the age of majority, \< 80 years * Patients with unilateral transfemoral or transtibial amputation of the lower limb of any origin (traumatic, vascular, congenital or neoplastic) with a definitive device. * Patients with stable locomotion with aids, without technical aids * Person able to understand simple orders, conditioning instructions Exclusion Criteria: Healthy Volunteers: * Person who is not affiliated or not a beneficiary of a social security system * Person subject to a legal protection measure (curatorship, guardianship) * Person subject to a legal protection measure * Pregnant, parturient or breastfeeding woman * Major incapable or unable to express his consent * Minor * Person with locomotor disorders (orthopedic, neurological, vascular, cardiac...) and/or balance disorders that may significantly alter walking * Person with a contraindication to wearing a virtual reality helmet (uncontrolled epilepsy, wound of an area that the helmet would cover, severe ophthalmological disorders etc.) Amputee patients: * Person who is not affiliated or not a beneficiary of a social security plan * Person under legal protection (guardianship, trusteeship) * Person subject to a legal protection measure * Pregnant, parturient or breastfeeding woman * Major incapable or unable to express his consent * Minor * Person with locomotor disorders (orthopedic, neurological, vascular, cardiac...) other than amputation that may significantly alter walking * Persons with contraindications to wearing a virtual reality helmet (uncontrolled epilepsy, wounds in an area that the helmet would cover, severe ophthalmological disorders, etc.) * Patients unable to participate in a group interview (qualitative study only)