Intergenerational Behavioral Intervention to Enhance Physical Activity in Older Adults at Risk for Alzheimer's Disease

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• Main Participant Inclusion criteria:
• Men and women > 60 years Who are current participants of the PREVENT-AD Longitudinal Cohort at McGill University.
• No contraindications to MRI Imaging. Normal cognition Not exercising more than 150 minutes of moderate-intensity exercise per week or sitting more than 8 hours per day AND responded "yes" to the question "Do you want to increase your physical activity?" Fluency in English or French Access to a computer or smartphone with internet Normal or corrected-to-normal vision based on the minimal 20/20 standard Ambulatory without significant increase in pain with walking or the assistance of walking devices
• Main Participant Exclusion Criteria:
• Primary care physician does not approve additional physical activity An inability to ambulate without the assistance of another person or severe pain
• Any unstable medical condition:
• History of a psychiatric illness including schizophrenia or Attention Deficit Hyperactivity Disorder (ADHD). History of anxiety or depression accepted if stable on medication for at least 6 months
• Current treatment for cancer - except non-melanoma skin cancer
• Neurological condition (e.g., multiple sclerosis, Parkinson's disease, and stroke)
• Current alcohol or substance abuse
• Current treatment for congestive heart failure, angina, uncontrolled arrhythmia, Deep Venous Thrombosis (DVT) or other unstable cardiovascular condition
• Myocardial infarction, coronary artery bypass grafting, angioplasty or other cardiac event in the past six months.
  • Younger Adult Inclusion Criteria:
• Can be identified as child or grandchild of participant (biological or adopted), 14 years or older.
• Can be a young adult (18 years or older) who is not a relative of the main participant, in case a grandchild or child is not available.
• Stable on antidepressants for more than 6 months.
• In contact with the primary participant more than once per 12 months at baseline
• Lives anywhere in Canada if 18 years and older, or anywhere accessible by mail in Quebec if 14 years and older but younger than 18 years.
• Normal or corrected-to-normal vision based on the minimal 20/20 standard to complete the cognitive tasks
• Able to speak, read, and write English or French
• No diagnosis of neurological disease or unstable health condition
  • Study Partner Exclusion Criteria:
• Not in contact with the primary participant more than once per 12 months at baseline