Clinical Research Directory

Inclusion Criteria: AGE: 18-64 years DIAGNOSIS: A self-reported current diagnosis of major depressive disorder and/or at least mild depressive symptoms (\>= 5) on the Patient Health Questionnaire, 9-Item (PHQ-9). DEVICE: Possess an iPhone or Android smartphone with internet access to download the app. LANGUAGE: Read, write understand, and communicate in the English language (or as appropriate) Exclusion Criteria: 1. Are experiencing acute risk of harm to self or others 2. Have an active alcohol or substance use disorder 3. Physical disability preventing exercise 4. Active psychosis or mania 5. Severe cognitive impairment 6. Current pregnancy 7. Patients whose depression is directly linked to another major primary psychiatric disorder, such as psychosis or bipolar disorder 8. Exercise \>= 90 min moderate-vigorous physical activity per week or \>= 3 times/week 9. Anticipate a major absence (e.g., long vacation, surgery) in the next 3 months 10. Anticipate a major change to participants' current antidepressant treatment regimen (if any, e.g., medications, psychotherapy) in the next 3 months