Numerous changes in physiological functioning accompany the aging process. Gradual declines in fundamental aspects of the neuroendocrine, cardiovascular, and immune systems contribute to increased risks for morbidity and mortality. Importantly, alterations in physiological processes are not invariant with age but are influenced by individual differences in vulnerability and resilience that accrue across the life span. In this review, I focus on what is known about positive emotion as a contributing factor in lowering morbidity and mortality in older adults. I describe plausible pathways that may underlie the association between positive emotion and health and review illustrative studies examining these pathways. The findings point to new research questions that pose important research opportunities.
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