Kids with chronic conditions walk stronger with VR at home

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patient aged 6 to 17 years at date of inclusion; * Able to walk for 5 minutes on a treadmill with or without body weight support, with or without technical aids; * Be able to understand and play virtual reality games (immersive or non-immersive); * Be able to answer questionnaires; * Patient affiliated to or benefiting from a social security scheme; * Informed consent, dated and signed by parents or guardians (if minors), to participate in the study; * Included in a care program specific to their chronic condition for at least 6 months; * Meet the following criteria depending on the group: PC group: * Diagnosis of CP * Functional level classified II or III according to the Gross Motor Function Classification System (GMFCS) * Rehabilitation goal: improvement of gait and/or gross motor function OB group: * Overweight or obese, defined by a BMI above the IOTF-25 percentile * Aim to increase daily physical activity * No history of hip pathology Group NM: * Diagnosis of one of the following neuromuscular pathologies: spinal muscular atrophy type 3, Duchenne disease, congenital myopathy or Charcot Marie Tooth. * Functional level of grade 2 to 6 on the Walton scale, or grade 3 to 7 on the Vignos scale * Rehabilitation goal: improvement of walking and/or gross motor skills Exclusion Criteria: * Patients weighing over 100 kg (due to the technical constraints of using the AMY mat). * For children aged 6 to 11: in connection with the immersive virtual reality device: problems with stereoscopic vision (perception of images in 3 dimensions), unstabilized epilepsy, facial trauma \< 3 months, hearing or visual impairment, pain, dizziness or nausea caused by using immersive virtual reality. * Patients who have undergone surgery in the last 3 months; * Patients who have received intramuscular botulinum toxin injections in the lower limbs or intensive therapy in the 3 months prior to inclusion; * Patient with a non-routine therapeutic program planned within 5 months that could lead to confusion with the tested program; * Patient with insufficient understanding of the French language; * Patient opposition (child or adolescent); * Persons deprived of liberty by judicial or administrative decision; * Persons under compulsory psychiatric care; * Persons under legal protection;