Table 3.

Power spectral and transfer function analysis of dynamic cerebral autoregulation during spontaneous changes in BP and CBFv

	rIPC + exercise		rIPC only		LMM
	Week 0	Week 8	Week 0	Week 8
Power spectrum
Baseline MCAv power (cm/s2)
VLF	2.69 ± 1.17	2.86 ± 1.53	2.41 ± 2.15	2.87 ± 1.37	0.13
LF	1.69 ± 0.96	1.81 ± 1.30	1.58 ± 0.122	2.61 ± .1.86	0.84
HF	0.47 ± 0.24	0.52 ± 0.28	0.81 ± 0.27	0.97 ± 0.21	0.19
Baseline BP power (mmHg2)
VLF	4.23 ± 1.47	3.43 ± 1.95	4.52 ± 2.72	4.96 ± 3.62	0.21
LF	2.26 ± 1.43	2.28 ± 2.00	2.05 ± 1.17	1.77 ± 0.86	0.32
HF	0.44 ± 0.13	0.40 ± 0.22	0.44 ± 0.31	0.43 ± 0.23	0.69
Transfer function
Spontaneous oscillations
VLF gain (cm s mmHg)	0.68 ± 0.23	0.73 ± 0.32	0.51 ± 0.08	0.51 ± 0.06	0.72
VLF Ngain (%/mmHg)	1.15 ± 0.22	1.34 ± 0.62	0.98 ± 0.25	1.35 ± 0.75	0.69
VLF phase (radians)	0.77 ± 0.32	0.87 ± 0.41	1.03 ± 0.48	1.08 ± 0.69	0.98
VLF coherence	0.54 ± 0.14	0.51 ± 0.01	0.52 ± 0.23	0.50 ± 0.20	0.14
LF gain	0.74 ± 0.29	0.75 ± 0.29	0.75 ± 0.25	0.88 ± 0.34	0.16
LF Ngain	1.26 ± 0.41	1.40 ± 0.41	1.35 ± 0.45	1.43 ± 0.59	0.54
LF phase	0.52 ± 0.38	0.65 ± 0.31	0.89 ± 0.49	0.74 ± 0.41	0.31
LF coherence	0.56 ± 0.09	0.55 ± 0.12	0.50 ± 0.11	0.51 ± 0.21	0.31
HF gain	1.00 ± 0.43	0.99 ± 0.50	0.97 ± 0.53	1.00 ± 0.31	0.20
HF Ngain	1.77 ± 0.42	1.81 ± 0.70	1.47 ± 0.32	1.84 ± 0.45	0.43
HF phase	0.14 ± 0.66	0.09 ± 0.51	0.33 ± 0.21	0.18 ± 0.08	030
HF coherence	0.61 ± 0.08	0.63 ± 0.08	0.63 ± 0.06	0.63 ± 0.07	0.75

Data presented as means ± SD

PS power spectrum, VLF very low frequency, LF low frequency, HF high frequency, MCAv middle artery cerebral velocity, BP blood pressure, Ngain normalised gain, LMM linear mixed model