Table 3.

Central and peripheral hemodynamics

	Baseline				Peak Change
	Young		Old		Young		Old
	Supine	Upright	Supine	Upright	Supine	Upright	Supine	Upright
MAP, mmHg	86 ± 1	86 ± 2	94 ± 4	91 ± 4	−5 ± 1†	−5 ± 1†	−7 ± 2†	−6 ± 2†
CO, l/min	5.5 ± 0.3	5.7 ± 0.3	5.4 ± 0.5	5.3 ± 0.4	1.4 ± 0.3†	1.2 ± 0.2†	1.3 ± 0.3†	1.3 ± 0.2†
SV, ml/beat	100 ± 6	96 ± 6	98 ± 10	97 ± 9	14 ± 3†	11 ± 1†	9 ± 2†	13 ± 2†
HR, beats/min	56 ± 2	59 ± 2*	56 ± 3	58 ± 3	11 ± 2†	8 ± 2†	16 ± 5†	14 ± 5†
LBF, ml/min	364 ± 34	359 ± 54	250 ± 19#	247 ± 19#	596 ± 68†	1026 ± 85†*	417 ± 42†#	412 ± 56†#
LVC, ml•min−1•mmHg−1	4.2 ± 0.4	4.3 ± 0.8	2.7 ± 0.2#	2.8 ± 0.3#	7.1 ± 0.8†	12.8 ± 1.3†*	4.7 ± 0.4†#	4.8 ± 0.5†#

Values are means ± SE for young (n = 10) and old (n = 12). MAP, mean arterial pressure; CO, cardiac output; SV, stroke volume; HR, heart rate; LBF, leg blood flow; LVC, leg vascular conductance.

^*P < 0.05 compared with supine.

^†P < 0.05 compared with baseline.

^#P < 0.05 compared with young.