A Good Massage Brings Biological Changes, Too
Oct 13, 2010
Does a good massage do more than just relax your muscles? To find out, researchers at Cedars-Sinai Medical Center in Los Angeles recuited 53 healty adults and randomly assigned 29 of them to a 45-minute session of deep-tissue Swedish massage and the other 24 to a session of light massage.
All of the subjects were fitted with intravenous catheters so blood samples could be taken immediately before the massage and up to an hour afterward.
To their surprise, the researchers, sponsored by the National Center for Complementary and Alternative Medicine, a division of the National Institute of Health, found that a single session of massage caused biological changes.
Volunteers who received Swedish massage experienced significant decreases in levels of the stress homone cortisol in blood and saliva, and in arginie vasopressin, a hormone that can lead to increases in cortisol. They also had increases in the number of lymphocytes, white blood cells that are part of the immune system.
Volunteers who had the light massage experienced greater increases in oxytocin, a hormone associated with contentment, than the Swedish massage group, and bigger decreases in adrenal corticotropin hormone, which stimulates the adrenal glands to release cortisol.
The study was published online in The Journal of Alternative and Complementary Medicine.
The lead author, Dr. Mark Hyman Rapaport, chairman of phychiatry and behavioral neurosciences at Cedars-Sinai, said the findings were "very, very intriguing and very, very exciting - and I'm a skeptic."
By Roni Caryn Rabin, The New York Times
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