Aromatic effects of a Japanese citrus fruit-yuzu (Citrus junos Sieb. ex Tanaka)-on psychoemotional states and autonomic nervous system activity during the menstrual cycle: a single-blind randomized controlled crossover study.

As to physiological measurements using acceleration plethysmography, the ratio of LF to HF power decreased, and the coefficient of the variation of the a-a intervals, indicating parasympathetic nervous system activity, increased, although the changes did not reach statistical significance.

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