Reducing Dementia Risk With Digital Health Coaching

Inclusion Criteria: * Age 45-75 * BMI 18.5 - 39.9 kg/m2 * Fluent in English (written and spoken) * A minimum of 2 of the following risk factors for AD from ANU-ADRI: High school education or less; Overweight, or class I or class II obese (BMI 25-39.9 kg/m2); History of diabetes; History of hypertension; History of high cholesterol; History of smoking; History of traumatic brain injury * Maximum of 1 of the following protective factors for AD from ANU-ADRI: High level of physical activity; High fish consumption; High level of cognitive engagement * Ability to send and receive text messages * Own a smartphone, have a reliable internet connection, and willing to use email * Ability to participate in light to moderate physical activity * Willingness to be randomized Exclusion Criteria: * Physician diagnosis of: mental health condition (e.g., eating disorder, alcohol/substance use, schizophrenia, etc.); neurologic conditions (e.g. epilepsy, stroke, multiple sclerosis, Parkinson's disease, brain tumor, or severe traumatic brain injury); dementia, probable dementia, or mild cognitive impairment; other significant health condition (e.g. congestive heart failure, chronic obstructive pulmonary disease, coronary artery disease, renal failure, chronic kidney disease, pulmonary hypertension) * Recent cardiovascular event or recent treatment for cancer (within the last year); on dialysis; or on active organ transplant list * Visual problems that prevent viewing screen at a normal distance (e.g., legal blindness, detached retina, occlusive cataracts) * History of learning disability * Currently participating in a formal cognitive training coaching program or other lifestyle change program (e.g. diabetes prevention program) * Currently pregnant or planning on becoming pregnant in the next two years