The purposes of this project are four-fold: 1) to determine if a 6-month home-based targeted exercise program results in immediate and sustained reduction in falls risk and incidence ; 2) to identify the factors that contribute to a reduction in fall risk and incidence; 3) to determine if a decrease in physiological fall risk and/or fall incidence results in increased quality of life and participation in older adults with MS; and 4) to determine the association between cognition, environment and comorbidities on future falls and intervention efficacy.