Happy older latinos are active: a walk a day may keep the blues away

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

Inclusion Criteria: * Latino (self-identified); * Age 60+; * Subthreshold depression defined as a score ≥ 5 on the Patient Health Questionnaire (PHQ-9), OR subthreshold anxiety as defined as a score ≥ 5 on the GAD-7; * Do not meet criteria for current MDD or GAD as indicated by the Mini International Neuropsychiatric Inventory (MINI); * Voluntary informed consent for participation in the study by the participant or by the participant's legally designated guardian or conservator; * Medical clearance for participation in a health promotion intervention by a physician, physician's assistant, or nurse practitioner; * Not taking steroidal or anti-inflammatory medication (including NSAIDs) within 2 weeks of treatment randomization; * Expect to be resident in Miami for the subsequent 2 years. Exclusion Criteria: * Have met criteria for major depressive disorder or generalized anxiety disorder within the past 12 months; * Have met criteria for alcohol or other substance abuse disorders within the past 12 months; * Are currently receiving antidepressant medication or participating in other mental health treatment; * Have a lifetime history of bipolar disorder or other psychotic disorder including major depression with psychotic features; * Have a diagnosis of any neurodegenerative disorder or dementia (Parkinson's disease, Alzheimer's, vascular, frontotemporal dementia, etc.) or significant cognitive impairment as indicated by a Mini Mental Status Exam (MMSE) score \<24; * Are current tobacco smokers since smoking influences systemic inflammation; * Have contraindications to physical activity outlined in the American College of Sports Medicine standards; * Have high suicide risk, i.e., intent or plan to attempt suicide in the near future (a response of "yes" to questions 3, 4, and/or 5 on the Paykel Questionnaire; * Are unable to complete 10 m walk test; * Currently residing in a nursing or group home; * Have a terminal physical illness expected to result in the death within one year; * Any evidence of current infection; and * Have an acute or severe medical illness that precludes them from safely participating in a health promotion intervention (further defined in the protocol).