Effect of olfactory stimulation from aromatherapy on the autonomic nervous activity during aerobic exercises

Author:

Okada Katsuki1,Shimatani Koji2

Affiliation:

1. Ehime Prefectural Imabari Hospital

2. Prefectural University of Hiroshima

Abstract

Abstract Variations in the autonomic nervous system activity during exercise therapy in patients with cardiovascular diseases may lead to adverse events. Aromatherapy may reduce these adverse events by enhancing parasympathetic nervous activity (PNA). However, the effects of aromatherapy during exercise remain relatively unknown. This study aimed to evaluate the effect of aromatherapy on autonomic nervous activity and cardiorespiratory parameters during exercise and recovery. This randomized crossover study included 20 healthy men subjected to both aroma and placebo conditions which involved rest and moderate-intensity aerobic exercise on a cycle ergometer, followed by recovery. Heart rate variability (HRV) indices and cardiorespiratory parameters were measured during the rest, exercise, and recovery phases. Moreover, aroma preferences and emotional changes in response to the aroma were assessed. Under the placebo condition, high frequency (HF), root mean square of successive differences (RMSSD) indices, and heart rate (HR) showed delayed recovery (P < 0.05). Furthermore, a moderate positive correlation was identified between aroma preference, pleasant emotions induced by aromatherapy, and the HF index (P < 0.05). These results indicate that aromatherapy facilitates the recovery of PNA after exercise. Furthermore, these effects were more pronounced among individuals who exhibited a stronger preference for and more positive emotions toward aromas.

Publisher

Research Square Platform LLC

Reference71 articles.

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