While optimism is typically heralded as a good lifestyle choice overall, recent research shows that looking on the bright side may go so far as to improve heart health, according to ABC News Health.

The University of Michigan recently found that being optimistic significantly reduced incidence of stroke, according to the source. The institution's study reviewed the lifestyle and habits of 6,000 patients over 50 with no history of stroke.

"Past research has linked optimism with a range of health benefits, including cardiovascular outcome," study author Eric Kim explained to the source.

In a country where strokes effect millions of families and add strain to health insurance costs, this study may provide an essential key to helping to fight heart disease. Stroke is also the third leading cause of death in the nation, with approximately 137,000 Americans dying of it annually, according to The Centers for Disease Control and Prevention.

While the research does show a direct link between a good attitude and improved health, researchers are unclear on how exactly this connection is forged. Some speculate that optimism may help keep blood pressure under control, and take subsequent strain off of the heart, according to ABC News Health.