University of Maryland reported that in a study of 20 healthy people, provoking laughter did as much good for their arteries as aerobic activity. He doesn't recommend that you laugh and not exercise. But he does advise that you try to laugh on a regular basis. The endothelium, he explains, regulates blood flow and adjusts the propensity of blood to coagulate and clot. In addition, it secretes assorted chemicals in response to wounds, infection or irritation. It also plays an important role in the development of cardiovascular disease.
"The endothelium is the first line in the development of atherosclerosis, or hardening of the arteries," said Dr. Miller. "So given the results of our study, it is conceivable that laughing may be important to maintain a healthy endothelium. And reduce the risk of cardiovascular disease."
At the very least, he adds, "laughter offsets the impact of mental stress, which is harmful to the endothelium."
At the very least, he adds, "laughter offsets the impact of mental stress, which is harmful to the endothelium."
The researcher can't say for sure exactly how laughter delivers its heart benefit. It could come from the vigorous movement of the diaphragm muscles as you chuckle or guffaw. Alternatively, or additionally, laughter might trigger the release in the brain of such hormones as endorphins that have an effect on arteries.
