A US study shows that people who smile “fully” live longer.
The research was completed by researchers at Wayne University in Michigan, and the research paper was published in the latest issue of psychology.
Citing research papers, AFP reported that the researchers collected 230 photos of players who participated in the US Baseball League before the 1950s. According to the movement range of the mouth, eyes and cheek muscles when the characters in the photos smiled, their smiles were divided into “no smile”, “partial smile” and “full smile”.
Based on personal information such as birth date, body mass index, marital status and length of sports career, researchers determined the impact of physical status and other factors on the life span of these athletes.
The study found that the average life expectancy of the subjects who did not laugh was 72.9 years; The average life expectancy of the subjects with “partial smile”, that is, only grinning when smiling, was 75 years; The average life expectancy of the subjects who smiled fully, that is, when they smiled, they drove the relevant muscles of the face, was 79.9 years.
“This research result is similar to some other research results, proving that emotions are significantly related to mental and physical health and life span,” the research paper wrote
The author of the paper said that although it was not clear whether the subjects smiled spontaneously in front of the camera, the researchers believed that even if these athletes smiled at the request of the photographer, the degree of their smile could reflect their potential emotional status “on the whole”.
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