Thursday, January 17, 2013
Mindfulness Meditation May Relieve Chronic Inflammation
People suffering from chronic inflammatory conditions, such as rheumatoid arthritis, inflammatory bowel disease and asthma -- in which psychological stress plays a major role -- may benefit from mindfulness meditation techniques, according to a study by University of Wisconsin-Madison neuroscientists with the Center for Investigating Healthy Minds at the Waisman Center.
Mindfulness-based stress reduction, originally designed for patients with chronic pain, consists of continuously focusing attention on the breath, bodily sensations and mental content while seated, walking or practicing yoga.
While interest in meditation as a means of reducing stress has grown over the years, there has been little evidence to support benefits specific to mindfulness meditation practice. This was the first study designed to control for other therapeutic mechanisms, such as supportive social interaction, expert instruction, or learning new skills.
A class in stress reduction can be beneficial in many ways, some of which have little to do with mindfulness, according to Melissa Rosenkranz, assistant scientist at the center and lead author on the paper, which was published recently in the journal Brain, Behavior and Immunity. For example, learning to manage stress by engaging in regular physical activity may be therapeutic.
"We wanted to develop an intervention that was meant to produce positive change and compare the mindfulness approach to an intervention that was structurally equivalent," Rosenkranz says.
The study compared two methods of reducing stress: a mindfulness meditation-based approach, and a program designed to enhance health in ways unrelated to mindfulness.
The comparison group participated in the Health Enhancement Program, which consisted of nutritional education; physical activity, such as walking; balance, agility and core strengthening; and music therapy. The content of the program was meant to match aspects of the mindfulness instruction in some way. For example, physical exercise was meant to match walking meditation, without the mindfulness component. Both groups had the same amount of training, the same level of expertise in the instructors, and the same amount of home practice required by participants.
"In this setting, we could see if there were changes that we could detect that were specific to mindfulness," Rosenkranz explains.
Using a tool called the Trier Social Stress Test to induce psychological stress, and a capsaicin cream to produce inflammation on the skin, immune and endocrine measures were collected before and after training in the two methods. While both techniques were proven effective in reducing stress, the mindfulness-based stress reduction approach was more effective at reducing stress-induced inflammation.
The results show that behavioral interventions designed to reduce emotional reactivity are beneficial to people suffering from chronic inflammatory conditions.
The study also suggests that mindfulness techniques may be more effective in relieving inflammatory symptoms than other activities that promote well-being.
Rosenkranz emphasizes that the mindfulness-based approach is not a magic bullet.
"This is not a cure-all, but our study does show that there are specific ways that mindfulness can be beneficial, and that there are specific people who may be more likely to benefit from this approach than other interventions."
Significant portions of the population do not benefit from available pharmaceutical treatment options, for example. Some of these patients suffer from negative side effects of the drugs, or simply do not respond to the standard-of-care for treatment of the disorder.
"The mindfulness-based approach to stress reduction may offer a lower-cost alternative or complement to standard treatment, and it can be practiced easily by patients in their own homes, whenever they need," Rosenkranz says.
Scientists at the Center for Investigating Healthy Minds conduct rigorous research on the physiological effects of meditation on the brain, and the power of the brain to influence human health. This study adds to the growing body of knowledge concerning the mechanisms of mindfulness and how it affects the body.
Co-authors on the paper were Richard J. Davidson, Donal G. MacCoon, John F. Sheridan, Ned H. Kalin and Antoine Lutz.
This work was supported by grants from the National Center for Complementary and Alternative Medicine (U01AT002114-01A1 to Antoine Lutz; and P01-AT004952 to Richard J. Davidson), the National Institute of Mental Health (P50-MH069315 to Richard J. Davidson), and a core grant from the National Institutes of Health to the Waisman Center (P30-HD003352, to Marsha Selzer), the Fetzer Institute, the John Templeton Foundation, and the Mental Insight Foundation.