Also according to psychologist Steven Sultanoff interview for an article for WebMD, laughter has been shown to increase tolerance of pain and boost the bodyâ€™s production of infection-fighting antibodies, which can help prevent hardening of the arteries and subsequent conditions caused thereby such as angina, heart attacks, or strokes.
A study in Japan shows that laughter lowers blood sugar after a meal.
Studies at the University of Maryland found that when a group of people were shown a comedy, after the screening their blood vessels performed normally, whereas when they watched a drama, after the screening their blood vessels tended to tense up and restricted the blood flow.
Studies show stress decreases the immune system. Some studies have shown that humor may raise infection-fighting antibodies in the body and boost the levels of immune cells.
Nearly 2/3 of people with asthma reported having asthma attacks that were triggered by laughter, according to a study presented at the American Thoracic Society annual meeting in 2005.
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