 The premise of this clinical trial is that disability among seniors is a potentially preventable chronic condition rather than an irreversible consequence of aging and disease. The investigators proposed novel approach to locomotion has the potential to shift treatment paradigms in the field of disability by introducing cognitive approaches to mobility that can be applied to prevention and rehabilitation in diverse settings. Through this proof of concept secondary prevention trial the investigators will fill an important gap in knowledge for practicing evidence-based medicine and developing effective interventions for a major health outcome affecting a substantial proportion of the U.S. aging population. 