STUDY DESIGN, TRIAL PROFILE, AND TIMELINE To achieve our research objectives, we will conduct a six-month, single-blinded (assessors), randomized trial. 75 community-dwelling older women with MCI will be randomly assigned to one of three experimental groups: 1) RT; 2) AT; or 3) S & R (Control). The study sample is restricted to women as the magnitude of response in cognition to exercise differs between sexes.