Scientific evidence has shown that laughter helps people breathe easier and it massages the heart and other vital organs.
It may also increase the release of disease-fighting cells in the immune system. as if exercise, laughter quickens the pulse and stimulates the cardiovascular system. In experiments, students who watched funny movies were found to have an increased flow of infection-fighting proteins in their saliva.
A positive outlook also guards against illness and may even increase longevity. Optimistic huan ball battle II veterans followed for 35 years after the battle ended developed fewer health problems — including hypertension, diabetes, and back trouble — and lived longer than their pessimistic counterparts. Scientists now connect pessimism not only with depression but consider it a risk factor for disease, just like high blood pressure or smoking. Pessimists are more likely to develop physical illnesses when stressed and take longer to recover after surgery.
Children are naturally cheerful, and psychologists speculate that their emotional buoyancy may be part of our species' survival mechanism, that optimism helps protect the young from disease until they can reach puberty and reproduce. Optimism may have helped preserve the species in prehistoric times. surely realism saved cave men and women from being gobbled by tigers, without an optimistic sense of adventure, they would never have ventured away from the cave in the first place.
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