There is credible evidence that a person's beliefs about the aging process are linked to and influence a variety of health outcomes. Purpose: This study determined whether aging expectations predict health-related quality of life. Furthermore, the study determined whether engagement in healthy lifestyles mediates the relationship between these variables. Methods: A descriptive-correlational study. This study enlisted a total of 95 respondents aged 60 to 85 years old in a large metropolitan

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... Data were analyzed using linear regression and mediation analysis. Results: Aging expectations and engagement in healthy lifestyles are a significant predictor of health-related quality of life (p< 0.05). Moreover, engagement in healthy lifestyles is found to be a significant mediator between the variables. Conclusion: Older adults who have positive aging expectations and engage in health promotion activities are more likely to report better health. Therefore, programs that promote a positive aging expectation and engagement in health-promoting activities should be implemented.