This study examined the relationship between psychological well being (using measures of vitality and optimism) and hypertension, finding that high emotional vitality but not optimism significantly predicted a reduced risk of hypertension.
Positive psychological well-being, especially optimism, protects against the incidence, and somewhat against the progression, of cardiovascular disease through a broad array of mechanisms, according to this extensive literature review.
Research suggests that optimistic individuals are more likely to live a healthier and longer life. However, more longitudinal studies are necessary to learn more about when, why, how and for whom optimism plays a role in good health and whether interventions that enhance optimism will yield health benefits.