There is one trait similar to optimism that seems to protect against cardiovascular disease: ikigai. This Japanese concept means having something worth living for, and ikigai is intimately related to the meaning element of flourishing (M in PERMA) as well as to optimism.
There are three prospective Japanese studies of ikigai, and all point to high levels of ikigai reducing the risk of death from cardiovascular disease, even when controlling for traditional risk factors and perceived stress. In one study, the mortality rate among men and women without ikigai was 160 percent higher than for increased CVD mortality as compared to men and women with ikigai.
In a second study, men with ikigai had only 86 percent of the risk of mortality from CVD compared to men without ikigai; this was also true of women, but less robustly so.
And in a third study, men with high ikigai had only 28 percent of the risk for death from stroke relative to their low-ikigai counterparts, but there was no association with heart disease.
It is healthy to add more meaning and purpose to your life, and it will improve your mood. To explore this, start here:
Why Goals Are Good
How to Find a Purpose in Life
Immediate Practical Benefits to Having a Purpose
"When you are inspired by some great purpose, some extraordinary projects, all your thoughts break their bonds; your mind trancends limitations; your consciousness expands in every direction; and you find yourself in a great new and wonderful world. Dormant forces, faculties and talents become alive and you discover yourself to be a greater person by far than you ever dreamed yourself to be."
Adam Khan is the author of Principles For Personal Growth, Slotralogy, Antivirus For Your Mind, and co-author with Klassy Evans of How to Change the Way You Look at Things (in Plain English). Follow his podcast, The Adam Bomb.