Do you know that health and happiness are co-related. According to US researchers of Columbia University Medical Center, people who are usually happy and enthusiastic are less likely to develop heart disease than those who tend to be glum?
They said happiness can help reduce heart health risks. And I remember reading a study published in the journal Psychosomatic Medicine back in 2006, it says that people who report positive emotions are less likely to catch colds and also less likely to report symptoms when they do get sick. This is said to be true regardless of their levels of optimism, extraversion, purpose and self-esteem, and of their age, race, gender, education, body mass or pre-study immunity to the virus.
One possible reason for the link between happiness and heart risk could be that people who are happier tend to have longer periods of rest or relaxation, and may recover more quickly from stressful events and not spend as much time "re-living" them.