RecruitingBehavioural interventionReducing African American's Alzheimer's Risk Through Exercise-Mild Cognitive Impairment (RAATE-MCI)The RAATE-MCI proposal is designed to determine the effects of physical activity on risk factors for Alzheimer's Disease in older African American adults. The study will compare a physical activity program to an active control group. RAATE-MCI is a 52-week randomized controlled trial. 144 African American adults aged 60 and older will be recruited.