Effects of Relaxation and Stress on the Capsaicin-Induced Local Inflammatory Response
Researchers at the University of Iowa studied how 3 conditions: stress, relaxation and a control condition, can affect an inflammatory response artificially induced by injecting capsaicin, the pungent compound in chili peppers, under the skin. 50 subjects – 28 men and 22 women – were pre-trained in relaxation, using an imagery-based relaxation tape, and then randomized to one of the experimental groups – a 20-minute stress test, a relaxation tape or a video control, followed by a capsaicin injection in the forearm.