Assessment of a Portable Digital Device for Quantified Analysis of Markerless Walking in Volunteers With Neuromuscular Diseases or Asymptomatic Volunteers

* All volunteers * Age between 18 and 65 * Ambulatory * Informed consent to participate in the study * Member of or beneficiary of a social security system * Volunteers with a neuromuscular disease * Confirmed diagnosis of a neuromuscular disease of genetic origin (medical document to be provided upon enrollment in the study with proof of diagnosis) belonging to the list above. * Ability to walk for 2 minutes without assistance. * Ability to stand up from a chair with armrests at least 3 times in 30 seconds. * Ability to climb an inclined plane independently or with assistance to access the movement analysis room. Exclusion Criteria * All volunteers * Individuals under guardianship, curatorship, or legal protection * Pregnant or breastfeeding women * Non-ambulatory individuals * Individuals with epilepsy * Skin conditions preventing the placement of VICON motion sensors * Asymptomatic volunteers * Unstable respiratory or cardiac problems * Neurological, musculoskeletal, or psychiatric problems * Volunteers with a neuromuscular disease * Recent trauma or serious falls (≤ 6 months) * Individuals who have fallen more than twice in the past year and at least once in the past three months * Use of assistive devices such as rigid knee braces or walkers * Unstable cardiomyopathy * Individuals awaiting diagnosis Exclusion criteria * Inability to comply with the protocol requirements * Medical or social conditions that could interfere with the study, as determined by the coordinating investigator or co-investigators.