Table 1. Descriptive statistics of the average, minimum and maximum heart rate variation (beats·min) for sleep for each of the three sessions for each of the ten subjects. Data are expressed as the mean.

Subject	Average Heart Rate			Minimum Heart Rate			Maximum Heart Rate
	SES1	SES2	SES3	SES1	SES2	SES3	SES1	SES2	SES3
1	74	66	72	60	56	60	98	95	92
2	45	53	51	36	39	42	82	113	85
3	66	59	69	56	52	56	101	98	90
4	69	63	65	59	53	56	106	107	105
5	63	63	64	53	53	53	94	116	100
6	73	76	77	57	64	65	106	100	104
7	62	62	65	51	50	53	103	97	91
8	65	66	69	47	52	57	100	104	107
9	70	69	66	58	57	55	89	100	94
10	58	58	67	47	48	40	91	100	110
Mean	65	63	67	52	52	54	97	103	98
SD	9	6	7	7	6	8	8	7	9

Abbreviations: SES= Session, SD= Standard deviation.