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HOW STRESS ERODES HEALTH

By Daniel Goleman

People with many friends or family ties tend to live longer than loners. Heart attack victims who have emotional support survive longer than those who do not. The mind has many subtle influences on the body, and a spate of new studies are seeking to explore further the nature of this mysterious axis.

«Your closest relationships seem to matter most for your health», said Dr. Janice Kiecolt-Glaser, a psychologist at Ohio State University Medical School who has just completed a study showing that marital fights can weaken the immune sys­tems of couples.

She and other researchers are trying to find out how the body turns states of mind like close relationships into a biological advantage that improves health. The evidence to date points to physiological mechanisms in the immune and car­diovascular system.

«What is it that happens in a social network that makes such a difference for health?» asked Dr. Sheldon Cohen, a psychologist at Carnegie Mellon University. To find the answers, Dr. Cohen joined forces with Dr. Jay Kaplan, a psychiatrist at Bowman Gray School of Medicine in Winston-Salem, North Carolina, who stud­ies stress in macaque monkeys.

In their research, 40 male macaques were randomly assigned either to stable or shifting groups, the latter having three or four new monkeys added to their cage every month. For macaques, joining a new group of monkeys is highly agi­tating and stressful; the males threaten each other until a dominance hierarchy is established.

Yet even under the duress of the straggle for dominance, some monkeys re­mained friendly. «These monkeys touched other monkeys more, groomed their cagemates or simply sat close to them», Dr. Cohen said. «In monkeys, those are all gestures of affiliation».

After 26 months of shifting groups and fights for dominance, the friendliest monkeys were found to have stronger immune responses while the most hostile and aggressive monkeys had the poorest.

Dr. Cohen's results were reported in the journal Psychological Science.

If friendly intimacy protects the immune system from stress, consider what a fight does. «How couples handle their disagreements seems to affect their im­mune system», said Dr. Kiecolt-Glaser. She has been studying couples with her husband, Dr. Ronald Glaser, an immunologist and associate director for research at Ohio State University Medical School.

In their study, 90 couples were brought into a laboratory and asked to resolve an issue of disagreement. Continuous blood monitoring for 24 hours allowed their immune responses to be measured during and after the discussion.

«We found a far stronger effect on the couples' immune system than we ever expected», said Dr.Kiecolt-Glaser. «The more hostile you are during a marital argument, the harder it is on your immune system».

It is not, of course, the sheer number of relationships in a person's life that seem to offer a buffer against stress so much as the quality of those connections.

For example, a study of college students found that the more roommates dis­liked each other, the more often they came down with colds and the flu and vis­ited a physician.



«It's the most important relationships in your life, the people you see day in and day out, that seem to be crucial for health», said Dr. John Cacioppo, a psy­chologist at Ohio State University who did the roommate study with Mary Snydersmith, a graduate student.

But not all relationships are of equal significance. «If you have a romantic partner, we found, how you're getting along with your partner matters far more for your health than does how you like your roommate», Dr. Cacioppo said.

In a study of 194 elderly men and women who had suffered heart attacks, those who had two or more sources of emotional support were found to be twice as likely to survive longer than a year after the attack than those with no support, according to a report in The Annals of Internal Medicine.

 


The study, led by Dr.Lisa Berkman, an epidemiologist at Yale University Medical School, found that of the patients who said they had two or more people they could count on, only 27 percent died within the first year of the heart attack. But of the patients who reported no such close supports, 58 percent died within the year.

 


Date: 2015-12-24; view: 2067


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