. 2017 Nov 9;5(21):e13486. doi: 10.14814/phy2.13486

Table 2.

Transfer function analysis of spontaneous oscillations in mean arterial pressure and middle cerebral artery blood velocity

	Athletes	Controls	P‐values
Very low frequency (0.02–0.07 Hz)
n	15	8
Mean arterial pressure power (mmHg²)	10.811 ± 4.362	13.546 ± 13.630	0.48
Middle cerebral artery blood velocity power (cm/sec²)	8.992 ± 4.700	11.823 ± 12.070	0.43
Coherence	0.489 ± 0.202	0.475 ± 0.228	0.88
Gain (cm sec⁻¹ mmHg⁻¹)	0.765 ± 0335a	0.798 ± 0.263b	0.82
Normalized gain (%/%)	1.267 ± 0.417a	1.263 ± 0.532b	0.99
Phase (radians)	0.630 ± 0.539a	0.674 ± 0.180b	0.84
Low frequency (0.07–0.20 Hz)
n	15	8
Mean arterial pressure power (mmHg²)	5.394 ± 4.171	7.648 ± 5.796	0.29
Middle cerebral artery blood velocity power (cm/sec²)	5.511 ± 4.759	4.972 ± 3.057	0.78
Coherence	0.652 ± 0.143	0.677 ± 0.152	0.70
Gain (cm sec⁻¹ mmHg⁻¹)	0.925 ± 0.191	0.802 ± 0.296	0.24
Normalized gain (%/%)	1.560 ± 0.291	1.315 ± 0.412	0.11
Phase (radians)	0.529 ± 0.172	0.460 ± 0.200	0.40
High frequency (0.20–0.40 Hz)
n	15	8
Mean arterial pressure power (mmHg²)	1.076 ± 0.891	1.100 ± 0.584	0.96
Middle cerebral artery blood velocity power (cm/sec²)	1.345 ± 1.177	0.843 ± 0.297	0.25
Coherence	0.644 ± 0.176	0.620 ± 0.277	0.80
Gain (cm sec⁻¹ mmHg⁻¹)	1.00 ± 0.208	0.882 ± 0.258b	0.26
Normalized gain (%/%)	1.701 ± 0.414	1.498 ± 0.389b	0.29
Phase (radians)	0.055 ± 0.211	−0.017 ± 0.204b	0.46

Values are mean ± SD.

n = 14.

n= 7.