1. Laughter is Like Exercise
“We now have laboratory evidence that mirthful laughter stimulates most of the major physiologic systems of the body,” said William Fry, M.D., professor of psychiatry at Stanford University Medical School, and expert on the relationship of humor to health. According to Fry, a good belly-laugh brings about physiological changes similar to aerobic exercise, speeding up the heart rate, increasing blood circulation and working numerous muscles all over the body