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Evidence-Based Complementary and Alternative Medicine
Volume 2011, Article ID 946537, 7 pages
Research Article

Aromatherapy Benefits Autonomic Nervous System Regulation for Elementary School Faculty in Taiwan

1Department of Photonics and Communication Engineering, Asia University, Taichung 41354, Taiwan
2Graduate Institute of Clinical Medical Science, China Medical University, Taichung 40402, Taiwan
3Ming-Chien Elementary School of Nantou County, No. 220, Jhangnan Rd., Ming-Chien Township, Nantou County 55146, Taiwan

Received 16 September 2010; Revised 13 December 2010; Accepted 15 February 2011

Copyright © 2011 Kang-Ming Chang and Chuh-Wei Shen. 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.


Workplace stress-related illness is a serious issue, and consequently many stress reduction methods have been investigated. Aromatherapy is especially for populations that work under high stress. Elementary school teachers are a high-stress working population in Taiwan. In this study, fifty-four elementary school teachers were recruited to evaluate aromatherapy performance on stress reduction. Bergamot essential oil was used for aromatherapy spray for 10 minutes. Blood pressure and autonomic nervous system parameters were recorded 5 minutes before and after the application of the aroma spray. Results showed that there were significant decreases in blood pressure, heart rate, LF power percentage, and LF/HF while there were increases in heart rate variability and HF power percentage (P<.001) after application of the aromatherapy spray. Further analysis was investigated by dividing subjects into three background variables (position variables, age variables, gender variables) and anxiety degree groups. All parameters were significantly different for most subgroups, except for the substitute teachers and the light-anxiety group. Parasympathetic nervous system activation was measured after aromatherapy in this study. It encouraged further study for other stress working population by aromatherapy.