Monitoring Fatigue In Daily Life In Adults With Cerebral Palsy or Acquired Brain Injury

Inclusion Criteria: * Score of minimum 4 on the 7-item Fatigue Severity Scale (CP and ABI only) * Speak, read, and write Danish * Living in a private residence (i.e., not in institutional care or facilities providing 24-hour assistance) * Able to walk independently or with assistive devices over short distances * Able to operate a smartphone independently Additional inclusion criteria for CP specifically: * Self-reported diagnosis of CP * Gross Motor Function Classification System (GMFCS) level ≤ II * Communication Function Classification System level ≤ II Additional inclusion criteria for ABI specifically: * Self-reported diagnosis of ABI, including stroke, traumatic brain injury, brain infections, toxins, anoxia, or encephalopathy (transient ischemic attack, concussion or post-concussion syndrome, intracranial tumors, or progressive brain diseases are not included) * Between three months and two years post-injury * modified Rankin Scale (mRS) score ≤ 3 Exclusion Criteria: * History of other neurological disorders or chronic fatigue syndrome requiring treatment * Current substance or alcohol abuse * Night shift work or travel across time zones (1 to 3 zones within the last week or 4 to 6 zones within the last two weeks or at least 7 zones within the last 4 weeks)