Home Exercise for Individuals With Neurodegenerative Disease

Inclusion Criteria: * The eligibility criteria for males is X-linked adrenoleukodystrophy as determined by biochemical determination or genetic testing. * The eligibility criteria for females is X-linked adrenoleukodystrophy as determined by biochemical determination, genetic testing, or pedigree analysis. * The Leukoenceophalopathy with brainstem and spinal cord involvement and lactate elevation inclusion criterion is a confirmed DARS2 mutation through genetic analysis. * For people with cerebellar ataxia, people with diagnoses of cerebellar damage from stroke, tumor or degeneration will be included. Those with a genetically confirmed cerebellar disorder will be asked to provide their genetic testing to note their particular type of ataxia. * We will also include patients with other neurodegenerative diseases similar to these disorders as determined by chart review and clinical exam. Healthy Volunteers * Able to stand for 30 seconds without upper extremity support * Ambulatory (including use of a cane or a walker) * Able to walk for 2 minutes Exclusion Criteria: * Other medical or psychological conditions which in the clinical judgement of the investigator would interfere with acquiring the study information or performing the exercises safely including but not limited to: Uncontrolled hypertension, orthopedic conditions, diabetes, seizure disorder, peripheral vestibular loss, severe aphasia, dementia, pregnancy