Table 4.

Cerebro- and cardio-vascular responses to submaximal exercise in COPD and controls

	Exercise 1					Exercise 2
	COPD		Control			COPD		Control
	BL1	EX1	BL1	EX1	P	BL2	EX2	BL2	EX2	P
Cerebrovascular
$\overline{\mathbf{V}}\mathbf{P},\mathbf{cm}\cdot {\mathbf{s}}^{-\mathbf{1}}$	42.8 ± 10.4	52.4 ± 10.3	44.2 ± 13.6	50.2 ± 13.3	*	40.2 ± 12.1	51.1 ± 11.5	43.8 ± 12.5	48.7 ± 11.9	* †
%		25 ± 22		15 ± 13	*		31 ± 26		13 ± 10	* # †
CVC, cm·s -1 ·mmHg -1	0.46 ± 0.11	0.47 ± 0.09	0.49 ± 0.15	0.50 ± 0.15		0.45 ± 0.13	0.46 ± 0.90	0.47 ± 0.14	0.49 ± 0.15
%		5 ± 15		3 ± 8			9 ± 27		4 ± 8
Cardiovascular
HR, bpm	67 ± 7	93 ± 11	66 ± 8	90 ± 14	*	69 ± 8	101 ± 10	71 ± 12	92 ± 15	* †
MBP, mmHg	94.5 ± 8.7	113.7 ± 18.1	92.0 ± 13.2	101.8 ± 12.7	* †	95.4 ± 9.6	112.9 ± 27.0	94.5 ± 15.2	103.7 ± 24.2	*
%		20 ± 13		11 ± 8	*		18 ± 22		9 ± 10	*
Sa o 2 ,%	94 ± 2	91 ± 4	95 ± 1	94 ± 2	* # †	95 ± 1	91 ± 4	96 ± 1	95 ± 1	* # †

Abbreviations: $\overline{\mathrm{V}}\mathrm{P}$; Peak cerebral blood flow velocity; CVC, cerebrovascular conductance (CVC = $\overline{\mathrm{V}}\mathrm{P}$/MBP); MBP, Mean arterial blood pressure; HR, Heart rate; Sao₂, Arterial oxygen saturation; * P ≤ 0.05 (main effect of exercise); # P ≤ 0.05 (main effect of grouping); † P ≤ 0.05 (exercise x grouping interaction).