Table 3.

Correlation coefficients for changes in heart rate variability parameters and metabolic syndrome risk factors over the intervention period.

	ΔRRI	ΔHR	ΔlnLF	ΔlnHF	ΔLFnu	ΔHFnu	ΔLF/HF
Age	0.242	−0.246	−0.112	−0.203	0.263	−0.263	0.305
	0.43	0.43	0.71	0.51	0.39	0.39	0.32
ΔWC	−0.152	0.196	0.349	0.543	−0.536	0.536	−0.455
	0.62	0.53	0.25	0.06	0.07	0.07	0.13
ΔSBP	−0.600	0.611	−0.294	−0.046	−0.221	0.221	−0.329
	0.04*	0.03*	0.34	0.87	0.47	0.47	0.28
ΔDBP	−0.305	0.378	−0.273	−0.119	−0.070	0.070	−0.105
	0.32	0.21	0.38	0.70	0.82	0.82	0.73
ΔFPG	−0.061	0.066	−0.424	0.084	−0.529	0.529	−0.518
	0.83	0.83	0.16	0.78	0.07	0.07	0.08
ΔTG	−0.326	0.372	−0.462	−0.329	−0.151	0.151	−0.214
	0.28	0.22	0.12	0.28	0.62	0.62	0.48
ΔHDL	−0.063	−0.050	−0.102	−0.287	0.182	−0.182	0.147
	0.83	0.87	0.73	0.35	0.56	0.56	0.64
ΔVO2max	0.123	−0.191	0.203	0.168	0.007	−0.007	−0.007
	0.68	0.54	0.51	0.59	0.97	0.97	0.97
ΔSteps	0.476	−0.438	0.035	0.406	−0.336	0.336	−0.280
	0.11	0.14	0.90	0.18	0.27	0.27	0.36

DBP, diastolic blood pressure; FPG, fasting plasma glucose; HDL, high density lipoprotein cholesterol; HF, high frequency power; HFnu, high frequency power in normalized units; HR, heart rate; LF, low frequency power; LFnu, low frequency power in normalized units; RRI, R–R interval; SBP, systolic blood pressure; TG, triglycerides; VO_2max, predicted maximal oxygen capacity; WC, waist circumference, *significant with p < 0.05.

Data presented as Spearman rank order correlation coefficient and p-value.