Inclusion Criteria:  Adult person Affiliated or beneficiary of a statutory social insurance scheme Free ans informed consent Following foot surgery like DMMO only or DMMO and hallux valgus  Exclusion Criteria:  Minor or legally protect adult Amputation disturbing the natural course of the step Osteoarticular diseases/sequelae affecting walking and/or balance Neuromuscular diseases/sequelae affecting walking and/or balance Vestibular disorders affecting balance Patients requiring a walking aid (e.g., walker) Pregnant woman Patient with dementia who are unable to follow verbal instructions