Table 2.

Sex differences in resting HRV measures

	Males		Females		Statistics
	M	SE	M	SE	t	df	2-tailed p	95% CI of difference
RMSSD (ms)	59.70	4.32	62.47	4.14	− 0.46	98	0.64	[− 14.65, 9.11]
Mean heart rate (bpm)	71.67	1.25	73.69	1.48	− 1.05	98	0.30	[− 5.86, 1.81]
Mean heart period (ms)	850.47	15.35	830.95	17.73	0.83	98	0.41	[− 26.91, 65.94]
Low frequency power (nu)	58.23	2.26	50.64	2.46	2.27	98	0.03	[0.96, 14.21]
High frequency power (nu)	41.66	2.25	49.18	2.46	− 2.26	98	0.03	[− 14.13, − 0.92]