Table 1.

Hemodynamic response to LBNP for three consecutive trials at day 0 and day 7.

			Trial 1		Trial 2		Trial 3		Trial 1 vs. 2 vs. 3 (p-values)
			Rest	LBNP	Rest	LBNP	Rest	LBNP	Rest	LBNP
SAP	(mmHg)	day 0	120 ± 15	109 ± 14*	121 ± 14	107 ± 13*	123 ± 12	109 ± 11*	0.670	0.237
		day 7	116 ± 10	102 ± 5*	115 ± 9	104 ± 4*	118 ± 8	104 ± 4*	0.194	0.245
DAP	(mmHg)	day 0	69 ± 12	71 ± 10	69 ± 10	69 ± 9	70 ± 9	71 ± 7	0.772	0.096
		day 7	67 ± 6	67 ± 2	67 ± 5	68 ± 4	68 ± 5	68 ± 3	0.191	0.145
MAP	(mmHg)	day 0	88 ± 14	85 ± 12*	89 ± 12	83 ± 10*	89 ± 10	85 ± 8*	0.773	0.124
		day 7	85 ± 7	80 ± 3*	84 ± 6	81 ± 4*	86 ± 6	81 ± 3*	0.124	0.124
HR	(beats/min)	day 0	66 ± 13	90 ± 10*	64 ± 12	85 ± 12*	62 ± 13	87 ± 10*	0.067	0.432
		day 7	62 ± 13	83 ± 14*	60 ± 12	83 ± 15*	60 ± 12	82 ± 16*	0.137	0.496
SV	(ml)	day 0	112 ± 16	78 ± 16*	113 ± 17	78 ± 17*	114 ± 17	79 ± 16*	0.233	0.810
		day 7	111 ± 15	76 ± 13*	109 ± 12	73 ± 12*	110 ± 12	75 ± 11*	0.476	0.326
CO	(l/min)	day 0	7.1 ± 1.3	6.8 ± 1.2*	7 ± 1	6.5 ± 1.1*	6.9 ± 1.1	6.6 ± 1.1*	0.435	0.098
		day 7	6.4 ± 1.1	6.3 ± 0.9	6.5 ± 1.1	6.1 ± 0.7*	6.5 ± 1.2	6.1 ± 0.9*	0.976	0.178
TPR	(dyn.sec/cm5)	day 0	1000 ± 152	1048 ± 204	1023 ± 180	1033 ± 172	1039 ± 164	1026 ± 172	0.081	0.156
		day 7	1017 ± 176	1042 ± 140	1046 ± 184	1086 ± 142	1045 ± 180	1078 ± 156	0.497	0.510
BRS	(ms/mmHg)	day 0	17 ± 8	8 ± 4*	19 ± 8	8 ± 2*	17 ± 7	8 ± 3*	0.089	0.765
		day 7	17 ± 6	10 ± 3*	20 ± 7	10 ± 3*	20 ± 10	10 ± 4*	0.419	0.877

Values are presented as mean ± SD. AP, arterial pressure (Systolic, Diastolic, and Mean); HR, heart rate; SV, stroke volume; CO, cardiac output; TPR, total peripheral resistance; BRS, baroreflex sensitivity. Rest and LBNP response were compared between Trial 1, Trial 2, and Trial 3.

^*p < 0.05 vs. rest.