Table 3.

Baseline and exercise values measured when the arm is below or above the level of the heart

	Below		Above		Time	Interaction
	Baseline	Exercise	Baseline	Exercise	P value	P value
FBF (ml/min)	76.7 ± 18.2	501.0 ± 51.9	79.8 ± 18.4	386.0 ± 22.7	<0.001	0.02
FBF (ml/min/100 g)	4.9 ± 0.9	33.1 ± 3.1	5.1 ± 0.9	25.5 ± 0.8	<0.001	0.02
MAP (mmHg)	87 ± 3	92 ± 5	91 ± 4	100 ± 6	0.001	0.30
FVC ((ml/min) × 100 mmHg)	89 ± 21	552 ± 68	88 ± 22	389 ± 29	<0.001	0.02
HR (beats/min)	55 ± 3	60 ± 3	56 ± 3	63 ± 3	<0.001	0.26
Haemoglobin (g/dl)	13.8 ± 0.2	13.9 ± 0.2	13.3 ± 0.2	13.8 ± 0.2	<0.001	0.01
$S_{{\text{aO}}_2}$ (%)	96.8 ± 0.8	97.2 ± 0.5	96.7 ± 0.7	97.2 ± 0.5	0.08	0.82
$C_{{\text{aO}}_2}$ (ml O2/100 ml)	18.5 ± 0.2	18.7 ± 0.3	17.8 ± 0.2	18.5 ± 0.2	<0.001	0.01
$C_{{\text{vO}}_2}$ (ml O2/100 ml)	11.1 ± 1.0	6.9 ± 0.3	9.6 ± 0.8	5.5 ± 0.3	<0.001	0.95
a–vO2diff (ml O2/100 ml)	7.4 ± 0.9	11.8 ± 0.3	8.2 ± 0.7	13.0 ± 0.3	<0.001	0.69
$\text{m}{\dot{V}}_{{\text{O}}_2}$ (ml/min)	4.8 ± 0.5	58.7 ± 6.0	6.1 ± 1.0	49.7 ± 2.1	<0.001	0.11
O2 delivery (ml O2/min)	14.3 ± 3.5	93.8 ± 10.1	14.2 ± 3.3	71.3 ± 3.9	<0.001	0.02

n = 8. FBF: forearm blood flow, LBM: lean body mass, MAP: mean arterial pressure, FVC: forearm vascular conductance, HR: heart rate, $S_{{\text{aO}}_2}$: arterial oxygen saturation, $C_{{\text{aO}}_2}$: arterial oxygen content, $C_{{\text{vO}}_2}$: forearm venous oxygen content, a–vO_2diff: arteriovenous oxygen difference, $\text{m}{\dot{V}}_{{\text{O}}_2}$: forearm muscle oxygen consumption. Data are means ± SEM.