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Table 2 Mean ± Standard deviation (minimum-maximum) of the analysis of HRV in geometric indexes in comparison with the control group and Baroque music with heavy metal music

From: Auditory stimulation with music influences the geometric indices of heart rate variability in men

Index Control Recovery 1 Baroque music Recovery 2 Heavy metal music p
RRTri 13.3 ± 5 (4.2-23.1) 13.1 ± 4 (4–21.3) 13.5 ± 3 (5.7-16.2) 13.2 ± 3 (4.1-20.4) 11.3 ± 3 (5.67-17.2)* 0.04
TINN 235.4 ± 83 (65–365) 231.2 ± 80 (61–355) 241.7 ± 61 (85–305) 233.1 ± 81 (62–361) 202.1 ± 56 (75–260) 0.07
SD1 21.2 ± 9 (4.8-31.4) 20.3 ± 8 (4.3-30.3) 21.2 ± 8 (6.1-33.3) 20.9 ± 9 (4.1-29.2) 20.5 ± 10 (5.5-36.1) 0.09
SD2 69.4 ± 21 (21–97.7) 69.3 ± 19 (20–99.8) 70.3 ± 17 (27–85.9) 68.1 ± 21 (19–98.9) 59 ± 15 (24.7-82.4)* 0.03
SD1/SD2 0.29 ± 0.11 (0.11-0.53) 0.28 ± 0.12 (0.11-0.52) 0.28 ± 0.16 (0.01-0.68) 0.29 ± 0.1 (0.12-0.51) 0.34 ± 0.18 (0.14-0.82) 0.076
  1. Legend: RRtri – Triangular index; TINN – triangular interpolation of RR intervals; SD1 – standard deviation of the instantaneous variability of the beat-to beat heart rate; SD2 – standard deviation of long-term continuous RR interval variability; SD1/SD2 ratio – ratio between the short - and long - term variations of RR intervals.
  2. *p < 0.05: vs. Control