Table 2.

Baseline (resting) hemodynamics under each condition

	Young				Older
	FBF, ml/min	FVC, ml/min	MAP, mmHg	Heart rate, beats/min	FBF, ml/min	FVC, ml/min	MAP, mmHg	Heart rate, beats/min
Control
10% MVC	66 ± 10	67 ± 11	98 ± 2	61 ± 2	72 ± 8	68 ± 8	105 ± 2*	63 ± 2
20% MVC	66 ± 10	68 ± 11	97 ± 2	61 ± 2	72 ± 6	67 ± 6	104 ± 3*	63 ± 2
40% MVC	66 ± 8	66 ± 8	98 ± 2	61 ± 2	67 ± 6	63 ± 6	104 ± 2*	63 ± 2
l-NMMA
10% MVC	47 ± 8†	45 ± 8†	103 ± 3†	59 ± 2	44 ± 4†	40 ± 4†	113 ± 2*†	61 ± 2
20% MVC	41 ± 7†	41 ± 7†	103 ± 3†	60 ± 2	42 ± 6†	37 ± 5†	113 ± 1*†	61 ± 2
40% MVC	45 ± 8†	44 ± 8†	103 ± 3†	60 ± 2	43 ± 5†	38 ± 4†	113 ± 2*†	62 ± 2

Values are means ± SE. l-NMMA, N^G-monomethyl-l-arginine; FBF, forearm blood flow; FVC, forearm vascular conductance.

^*P < 0.05 vs. young.

^†P < 0.05 vs. control at respective MVC.