The responses of subjective feeling, task performance ability, cortisol and HRV for the various types of floor impact sound: a pilot study

Table 4 Heart rate variability (HRV) parameters with or without soundproof mattress (M) under various floor impact sound

		B	T	I	BT	TI	BI	p-value*
HR	With mattress	84.05 ± 8.25	81.10 ± 7.20	83.58 ± 6.78	81.04 ± 7.30	81.92 ± 7.52	82.22 ± 6.89	0.025
HR	Without mattress	81.28 ± 1.93	81.65 ± 2.22	83.69 ± 1.79	80.41 ± 1.94	81.11 ± 1.95	82.86 ± 1.87	<0.001
SDNN	With mattress	20.66 ± 6.46	24.08 ± 7.06	20.85 ± 5.31	23.30 ± 6.44	21.94 ± 7.51	22.60 ± 6.42	0.013
SDNN	Without mattress	26.44 ± 16.01	22.84 ± 7.47	20.54 ± 6.21	22.73 ± 5.96	22.95 ± 7.64	20.48 ± 6.99	0.248
TP	With mattress	381.98 ± 263.46	559.24 ± 342.65	373.79 ± 156.62	473.85 ± 240.66	442.89 ± 283.62	485.09 ± 253.14	0.014
TP	Without mattress	849.46 ± 1307.7	507.60 ± 311.38	399.75 ± 246.66	462.79 ± 215.36	506.86 ± 335.45	382.88 ± 240.84	0.261
LF	With mattress	138.55 ± 104.63	213.46 ± 132.68	136.30 ± 56.39	170.19 ± 91.63	159.00 ± 101.34	187.27 ± 114.29	0.030
LF	Without mattress	382.20 ± 718.90	180.23 ± 113.28	147.89 ± 94.28	167.41 ± 66.61	199.74 ± 153.35	138.48 ± 88.66	0.274
HF	With mattress	243.43 ± 162.08	345.79 ± 213.76	237.48 ± 105.91	303.68 ± 161.93	283.85 ± 187.12	297.79 ± 157.14	0.013
HF	Without mattress	467.25 ± 595.76	327.36 ± 210.34	251.88 ± 156.28	295.35 ± 159.69	307.12 ± 193.18	244.40 ± 160.45	0.245
LF/HF	With mattress	0.51 ± 0.14	0.55 ± 0.11	0.52 ± 0.11	0.52 ± 0.13	0.52 ± 0.16	0.52 ± 0.15	0.900
LF/HF	Without mattress	0.57 ± 0.24	0.54 ± 0.16	0.54 ± 0.09	0.54 ± 0.14s	0.54 ± 0.15	0.58 ± 0.13	0.744

Abbreviation: B bang machine, T tapping machine, I impact ball, BT B and T, TI T and I, BI B and I, HR heart rate, SDNN standard deviation normal to normal, TP total power, LF low frequency, HF high frequency
Unit: Mean ± standard deviation
*p-value was calculated by repeated measures ANOVA

ISSN: 2052-4374