Table 2.

Thresholds for cutaneous vasodilatation: absolute T_or and ΔT_or

	Young		Older
	Tor (°C)	ΔTor (°C)	Tor (°C)	ΔTor (°C)
Control	36.74 ± 0.10	0.41 ± 0.07	36.76 ± 0.09	0.57 ± 0.06*
NOS inhibited	36.89 ± 0.08‡	0.56 ± 0.04‡	36.94 ± 0.06†	0.75 ± 0.05*†
Arginase inhibited	36.73 ± 0.11	0.40 ± 0.06	36.69 ± 0.07	0.50 ± 0.05
l-Arg supplemented	36.95 ± 0.13	0.52 ± 0.05	36.70 ± 0.09	0.52 ± 0.05
Arginase inhibited +
l-Arg supplemented	36.75 ± 0.10	0.42 ± 0.06	36.73 ± 0.09	0.54 ± 0.07*

Values are means ± s.e.m.; T_or, oral temperature; ΔT_or, change in oral temperature from baseline; NOS, nitric oxide synthase; l-Arg, l-arginine.

^*Significant difference versus young subject group (P < 0.05).

^†Significant difference versus control site within the older subject group (P < 0.05).

^‡Significant difference versus control site within the young subject group (P < 0.05).