Inclusion Criteria:  adults aged 30-55 years exposure to at least one form of threat-related adversity (e.g., exposure to violence; physical abuse) occurring prior to age 10 as documented by retrospective self-report Self-identified Black or African American Race access to high-speed internet sedentary lifestyle (<60 minutes of PA/week). no difficulties with mobility Does not currently require the use of an assisted walking device Does not have a history of balance difficulties Not currently pregnant or planning to become pregnant in the next 12 months  Exclusion Criteria:  Psychosis Significant suicide risk (i.e., current, active suicidal ideation with a plan) Engaging in moderate-intensity exercise >=20 min per day, >=3 times per week Current treatment for cancer Neurological condition (MS, Parkinson's, Dementia, MCI) or brain injury (Stroke) Substance use disorder in the past 3-months Current treatment for congestive heart failure, angina, uncontrolled arrhythmia, DVT or other cardiovascular event Myocardial infarction, coronary artery bypass grafting, angioplasty or other cardiac condition in the past year Sensory Impairment that would preclude neuropsychological testing Not fluent in English Travelling consecutively for 2+ weeks during the study uncontrolled hypertension Insulin-Dependent Diabetes Mellitus Self-identified race anything other than Black or African American Currently pregnant or planning to become pregnant in the next 12 months