Table 1.

Respiratory variables during baseline and fragrance inhalation of grapefruit essential oil in study 1

	BL	Inh-5 min	Inh-10 min
VE, L/min	8.4 ± 2.9	8.5 ± 2.8	8.1 ± 3.3
RR, breaths/min	16.2 ± 5.2	16.2 ± 4.9	16.1 ± 4.8
VO2, mL/min	236 ± 91	239 ± 93	230 ± 96
VCO2, mL/min	196 ± 80	207 ± 89	194 ± 89
RER	0.83 ± 0.08	0.86 ± 0.11	0.84 ± 0.12

Values are means ± SD. Average data for 5 min of baseline (BL) and for the first (Inh-5 min) and last half (Inh-10 min) of fragrance inhalation are shown

V_E, minute ventilation; RR, respiratory rate, V_O2, oxygen consumption rate; V_CO2, carbon dioxide production rate; RER, respiratory exchange ratio