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Evidence-Based Complementary and Alternative Medicine
Volume 2013 (2013), Article ID 952716, 14 pages
http://dx.doi.org/10.1155/2013/952716
Research Article

Randomized Controlled Trial of Mindfulness Meditation and Exercise for the Prevention of Acute Respiratory Infection: Possible Mechanisms of Action

1Department of Family Medicine, University of Wisconsin-Madison, 1100 Delaplaine Ct., Madison, WI 53715, USA
2Schools of Nursing, Medicine and Public Health-Design & Statistics Unit, 600 Highland Avenue, University of Wisconsin-Madison, P.O. Box 2544, Madison, WI 53792, USA
3Department of Medicine-Rheumatology Division, University of Wisconsin-Madison, 1 S. Park Street, Room 301, Madison, WI 53715, USA

Received 6 May 2013; Revised 15 August 2013; Accepted 19 August 2013

Academic Editor: Myeong S. Lee

Copyright © 2013 Aleksandra Zgierska et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. A randomized trial suggests that meditation and exercise may prevent acute respiratory infection (ARI). This paper explores potential mediating mechanisms. Methods. Community-recruited adults were randomly assigned to three nonblinded arms: 8-week mindfulness-based stress reduction ( ), moderate-intensity exercise ( ), or wait-list control ( ). Primary outcomes were ARI illness burden (validated Wisconsin Upper Respiratory Symptom Survey). Potential mediators included self-reported psychophysical health and exercise intensity (baseline, 9 weeks, and 3 months). A Baron and Kenny approach-based mediational analysis model, adjusted for group status, age, and gender, evaluated the relationship between the primary outcome and a potential mediator using zero-inflated modeling and Sobel testing. Results. Of 154 randomized, 149 completed the trial (51, 47, and 51 in meditation, exercise, and control groups) and were analyzed (82% female, 94% Caucasian, 59.3 ± SD 6.6 years old). Mediational analyses suggested that improved mindfulness (Mindful Attention Awareness Scale) at 3 months may mediate intervention effects on ARI severity and duration ( ); 1 point increase in the mindfulness score corresponded to a shortened ARI duration by 7.2–9.6 hours. Conclusions. Meditation and exercise may decrease the ARI illness burden through increased mindfulness. These preliminary findings need confirmation, if confirmed, they would have important policy and clinical implications. This trial registration was Clinicaltrials.gov: NCT01057771.