What is relationship between physical functioning and successful aging?

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In addition to demographic variables and cognition, much attention has been devoted to health-related predictors. Markers of physical functioning such as the absence of arthritis and hearing problems, hypertension, and medical comorbidities appear to be strong predictors of aging successfully. This relationship likely reflects the positive impact of the absence of disability on maintenance of independence in activities of daily living and robust quality of life, which in turn is associated with greater subjective experience of successful aging (Montross et al. 2006). In addition to health-related predictors, lifestyle factors such as preserved daily functioning, physical activity level, and being a nonsmoker are also related to aging successfully.