Table 8. Effects on blood pressure associated with heart rate variability (HRV) and muscle sympathetic nerve activity (10×).

Variable	24 h SBPa		24 h DBPb		24 h MBPc
	Regression Coefficients (95%CId)	p value	Regression Coefficients (95%CI)	p value	Regression Coefficients (95%CI)	p value
HRV e (n:28)
SDNN f (ms)	−0.7 (−1.5; 0.03)	0.058	−0.62 (−1.2; −0.1)	0.029	−0.7 (−1.3; −0.1)	0.02
RMSSD g (ms)	−2.2 (−4.1; −0.4)	0.019	−1.6 (−3.0; −2.5)	0.021	−2.4 (−3.9; −0.8)	0.009
HF h (ms)	−5.6 (−9.4; −1.8)	0.004	−3.7 (−6.8; −0.6)	0.021	−4.8 (−8.1; −1.4)	0.005
LF i (ms)	−3.7 (−7.7; 0.2)	0.065	−3.0 (−5.9; −0.06)	0.046	−3.5 (−6.8; −0.1)	0.044
LF/HF	28.3 (17.3; 39.3)	<0.001	−7.4 (−26.4; 11.5)	0,519	26.4 (18.8; 33.9)	<0.001
MSNA j /MVC k (n = 25)	1.8 (0.1; 3.5)	0.035	1.4 (0.05; 2.7)	0.049	1.6 (0.8; 2.4)	0.041

Multiple analysis adjusted for age, BMI and smoking;

^a: systolic blood pressure;

^b: diastolic blood pressure;

^c: men blood pressure;

^d: confidence interva;

^e: heart rate variability;

^f: standard deviation of normal RR intervals;

^g: root mean square of differences between NN adjacent intervals;

^h: high frequence;

ⁱ: low frequence;

^j: Muscle sympathetic- nerve activity-bursts/100 Heart beats;

^k: maximum voluntary contraction at 30%.