Vol. 28 No. 4 (2014):
Articles

Physiological effects of orange essential oil inhalation in humans

B.-J. Park
Department of Environment & Forest Resources, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-764, Republic of Korea.
K. Ono
Nissan Motor Co., Ltd. 1-1, Takashima 1-chome, Nishi-ku, Yokohama City, Kanagawa Prefecture 220-8686, Japan.
Y. Yoshinami
Nissan Motor Co., Ltd. 1-1, Takashima 1-chome, Nishi-ku, Yokohama City, Kanagawa Prefecture 220-8686, Japan.
Y. Miyazaki
Center for Environment, Health and Field Sciences, Chiba University, 6-2-1 Kashiwanoha, Kashiwa City, Chiba Prefecture 277-0882, Japan.

Published 2014-12-31

Keywords

  • Aroma therapy,
  • blood pressure,
  • horticulture therapy,
  • heart rate variability,
  • people-plant interaction

How to Cite

Park, B.-J., Ono, K., Yoshinami, Y., & Miyazaki, Y. (2014). Physiological effects of orange essential oil inhalation in humans. Advances in Horticultural Science, 28(4), 225–230. https://doi.org/10.36253/ahsc-18462

Abstract

This study was conducted to clarify the physiological and psychological effects of the odor of orange essential oil in humans. Thirteen healthy male university students (mean age 23.0±1.1 years) participated. The study was conducted in an artificial climate chamber with temperature 24°C, relative humidity 50%, and illumination 50 lux. The subjects randomly inhaled orange essential oil for 120 s. Fresh air inhalation was used as the control condition. Heart rate variability (HRV), blood pressure, and pulse rate were continuously measured before (resting time) and during inhalation of the experimental odor. In addition, sensory evaluation and subjective odor intensity were evaluated after inhalation. The high frequency component of HRV was significantly higher, systolic and diastolic blood pressure was significantly lower, and the subjective “feeling of comfort” was significantly greater during inhalation of the orange essential oil than during inhalation of fresh air. These findings indicate that inhalation of orange essential oil effectively induces relaxation in humans.

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