Table 1.

T_I, T_E, f_R, V_T, V_T/T_I, and V_E in each task and as a function of body position

Task:	Nasal Breathing		Oral Breathing		Deep Breathing		Hyperventilation
Body position:	Upright	Supine	Upright	Supine	Upright	Supine	Upright	Supine
TI , s	1.62 ± 0.16	1.73 ± 0.20	1.60 ± 0.19	1.71 ± 0.17	2.37 ± 0.43	2.06 ± 0.30	0.62 ± 0.05	0.62 ± 0.07
TE, s	2.82 ± 0.24	2.64 ± 0.22	2.75 ± 0.25	2.66 ± 0.27	3.79 ± 0.36	3.81 ± 0.38	0.89 ± 0.07	0.86 ± 0.08
fR, breaths/min	13.82 ± 1.12	14.08 ± 1.30	14.04 ± 1.19	14.19 ± 1.30	9.96 ± 0.75	10.22 ± 0.82	39.54 ± 3.33	40.94 ± 3.97
VT, ml	306.01 ± 39.21	312.62 ± 38.36	345.29 ± 47.65	391.83 ± 47.83	726.25 ± 91.13	723.28 ± 118.69	486.68 ± 72.15	492.45 ± 69.51
VT/TI, ml/s	189.19 ± 24.41	181.0 ± 22.16	215.27 ± 27.63	229.76 ± 26.73	306.21 ± 34.22	351.3 ± 48.46	782.6 ± 122.93	796.6 ± 134.85
VE, l·breaths−1·min−1	4.23 ± 0.55	4.40 ± 0.57	4.85 ± 0.60	5.56 ± 0.59	7.23 ± 0.94	7.39 ± 0.97	19.24 ± 2.89	20.16 ± 3.38

Values are means ± SE for inspiratory time (T_I), expiratory time (T_E), breathing frequency (f_R), tidal volume (V_T), inspiratory flow (V_T/T_I), and minute ventilation (V_E) in each task and as a function of body position (i.e., upright and supine).