 The American Association of Homes Services for the Aging AAHSA is conducting a trial that builds on a strong evidence base of the beneficial effect of exercise in old age in an effort to accelerate translation of research into practice in CCRCs. The trial will screen CCRC residents for disability using a short set of performance measures called the Short Physical Performance Battery SPPB. After identification of persons at risk for disability, we will enroll 320 CCRC residents to a program of moderate exercise or an active control arm focused on general wellness. The primary study endpoint is the SPPB score. Secondary endpoints include falls; hospitalizations, and death. 