Phase synchronization indices of the HF-components (mean ± SD) of participants and statistical results.

LF = low frequency; γ = synchronization index; RRI = R-R interval; SBP = systolic blood pressure; DBP = diastolic blood pressure; RESP = respiration; DB = deep breathing. *denotes a significant difference (p in case of significant a univariate interaction effect. Note : Multivariate analyses of variance of γSBPxRRI,HF, γDBPxRRI,HF and γSBPxDBP,HF significant for main effects only.