Fig. 5From: Physiological effect of olfactory stimulation by Hinoki cypress (Chamaecyparis obtusa) leaf oilThe 30-s averages and overall mean high-frequency (HF) component of the heart rate variability (HRV) during olfactory stimulation by Hinoki cypress leaf oil or control. a Changes in each 30-s average HF value over 90 s. b Overall mean HF values. Data are expressed as the mean ± standard error, n = 11, *P < 0.05 as determined by the paired t test (one-sided)Back to article page