A wide range of research has linked different forms of generosity to better health, even among the sick and elderly. In his book Why Good Things Happen to Good People, Stephen Post, a professor of preventative medicine at Stony Brook University, reports that giving to others has been shown to increase health benefits in people with chronic illness, including HIV and multiple sclerosis.
A 1999 study led by Doug Oman of the University of California, Berkeley, found that elderly people who volunteered for two or more organizations were 44 percent less likely to die over a five-year period than were non-volunteers, even after controlling for their age, exercise habits, general health, and negative health habits like smoking. Stephanie Brown of the University of Michigan saw similar results in a 2003 study on elderly couples. She and her colleagues found that those individuals who provided practical help to friends, relatives, or neighbors, or gave emotional support to their spouses, had a lower risk of dying over a five-year period than those who didn’t. Interestingly, receiving help wasn’t linked to a reduced death risk.
Researchers suggest that one reason giving may improve physical health and longevity is that it helps decrease stress, which is associated with a variety of health problems. In a 2006 study by Rachel Piferi of Johns Hopkins University and Kathleen Lawler of the University of Tennessee, people who provided social support to others had lower blood pressure than participants who didn’t, suggesting a direct physiological benefit to those who give of themselves.
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