Table 1.

Mean and t test scores during resting baseline and silent HU

Measures	Baseline		Silent HU		t test	P value
	Mean	Standard error	Mean	Standard error	t4 degrees of freedom=4	P significance level of .05
HR	68.6	2.32	63.4	2.77	4.8702	.008
RMSSD	46.396	8.28	58.734	8.98	−2.9317	.04
LF:HF	2.37	0.89	3.264	1.63	−0.5512	.61
Subjective stress (0-10)	6.54	0.70	3.1	0.56	4.4278	.01