Can a Home-Based digital program help people with Parkinson's move better?

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

Inclusion Criteria: * Diagnosis of idiopathic Parkinson's disease (self-reported; verification requested from treating physician or neurologist when possible) * Hoehn and Yahr stages I-IV (mild to moderate disease severity; ambulatory with or without assistance) * Age 18 years or older * Access to a computer, tablet, or smartphone with reliable internet connection * Basic digital literacy to navigate the study website (caregiver assistance permitted if needed) * Ability to communicate with study personnel in the local language (Portuguese, Greek, Croatian, or Italian) to understand instructions and provide informed consent * Willingness and ability to provide written informed consent electronically prior to enrolment * For those completing remote assessments, willingness to complete self-assessments with or without caregiver assistance following provided video instructions Exclusion Criteria: * Self-reported severe cognitive impairment that would preclude understanding and following exercise instructions, based on clinical judgment of referring provider or study coordinator following screening conversation * Significant active psychiatric problems (e.g., untreated major depression, psychosis, substance abuse) that would interfere with participation or adherence * Medical conditions contraindicating moderate-intensity exercise, including: Unstable cardiovascular disease (uncontrolled hypertension, recent myocardial infarction, unstable angina) Severe orthopedic limitations (acute fractures, severe osteoarthritis limiting mobility) Other systemic conditions that would make participation unsafe as determined by the participant's physician or study coordinator during screening * Pregnancy * Anticipated inability to complete the 8-week intervention period due to planned surgery, extended travel, or other commitments Participants with a caregiver willing to assist with technology, assessments, or exercise supervision are not excluded; caregiver involvement will be documented and considered in exploratory analyses where appropriate.