The InChianti Follow-Up Study

Background: \- Older persons are often referred to physicians because of mobility difficulties that grow worse as they age. To better understand the reasons for mobility difficulties in older persons, researchers conducted a population-based study of individuals living in the Chianti geographic area of Tuscany, Italy. Researchers are now interested in conducting a follow-up study on the original participants to assess the effects of aging on their mobility. Objectives: \- To conduct a follow-up study on the participants in the mobility study of older persons in the Greve in Chianti and Bagno a Ripoli areas near Florence, Italy. Eligibility: \- Original participants in the InChianti Mobility Study. Design: * The InChianti Follow-up Study will repeat most elements of the baseline evaluation from the original study. Participants will be seen on the 3-year anniversary of their baseline study assessment. * Participants will have a home interview with questions about their physical and mental health, family history, daily activities, and living conditions related to their continued mobility. * Participants will provide blood and urine samples, and will have tests of heart and motor nerve function and imaging studies of bones and the circulatory system. * Participants will also have a functional evaluation of their motor skills, including walking tests, range of motion tests, and grip strength.