Table 1.

Influence of low-frequency sound on heart rate variability indices in pre/post-test measures.

Variable	Time	Intervention	Interaction
	p	p	p
HRStanding (beats/min)	0.010	0.21	0.76
HRSupine (beats/min)	<0.001	0.054	0.68
Ln LFStanding (ms2)	<0.001	0.11	0.28
Ln LFSupine (ms2)	0.072	0.63	0.90
Ln HFStanding (ms2)	<0.001	0.12	0.99
Ln HFSupine (ms2)	0.019	0.88	0.85
Ln LF/HFStanding	<0.001	0.31	0.076
Ln LF/HFSupine	0.57	0.80	0.98

p—significance of ANOVA factors; HR—heart rate; Standing—standing body position in orthoclinostatic maneuver; Supine—supine body position in orthoclinostatic maneuver; Ln—natural logarithm; LF—low-frequency power; HF—high-frequency power; LF/HF = LF/HF ratio.