Table 5.

Correlation among heart rare variability measures and biochemical characteristics using Pearson correlation coefficient before 6 months of exercise.

Biochemical Characteristics	Heart rate variability measures
	SDNN	RMSSD	pNN50	LF	HF	LF/HF	SD1	SD2	SD2/SD1
Fasting glucose	NS	−0.70	NS	NS	-0.46	NS	NS	NS	NS
		0.001			0.001
HbA1c	NS	−0.55	NS	NS	-0.56	NS	NS	NS	NS
		0.001			0.001
Total cholesterol	NS	−0.47	NS	NS	-0.77	NS	NS	NS	NS
		0.002			0.001
LDL	NS	−0.67	NS	NS	-0.59	NS	NS	NS	NS
		0.001			0.001
HDL	NS	NS	NS	NS	NS	NS	NS	NS	NS
Triglycerides	NS	−0.68	NS	NS	-0.48	NS	NS	NS	NS
		0.001			0.001

In each cells, the number described above is correlation coefficient, and the number below is p value of Pearson correlation coefficient. SDNN, standard deviation of all RR intervals; RMSSD, the square root of the mean of the sum of the squares of differences between adjacent RR intervals; pNN50, percentage of consecutive RR intervals that differ by more than 50 ms; LF, low frequency; HF, high frequency; SD1, standard deviation perpendicular to line of entity in Poincare plot; SD2, standard deviation along the line of entity in Poincare plot; HbA_1c, glycated hemoglobin; LDL, low-density lipoprotein; HDL, high-density lipoprotein; NS, statistically non-significant.