Table 2. Time domain or frequency domain heart rate variability indices. Data are means (ąSE).

 

 

rest

rec1

rec2

rec3

rec4

rec5

Mean RR

M

1098 (46)*

688 (38)*

717 (38)*

737 (36)*

763 (37)*

794 (38)*

C

833 (33)

604 (14)

624 (13)

641 (12)

654 (14)

659 (12)

SDRR

M

108.2 (10.7)*

13.5 (1.8)

13.2 (1.3)

16.7 (4.0)

18.5 (3.6)

19.7 (2.5)

C

56.3 (8.8)

15.5 (1.6)

17.1 (2.8)

16.0 (1.8)

19.4 (2.9)

20.6 (3.1)

LF

M

812.6 (12.0)

30.8 (8.6)

44.4 (12.7)

80.6 (44.7)

90.6 (47.9)

156.4 (62.2)

C

517.8 (140.5)

42.7(10.0)

55.4 (11.1)

98.5 (20.0)

96.1 (39.6)

126.1 (27.6)

HF

M

654.3 (136.6)*

9.9 (3.8)

16.2 (5.1)

25.7 (10.1)

36.1 (15.1)

45.5 (14.7)

C

218.3 (64.2)

9.5 (1.7)

13.6 (2.1)

17.9 (2.4)

16.5 (3.5)

26.7 (4.5)

LF/HF

M

.9 (.3)*

4.5 (1.1)

4.2 (1.0)

3.6 (1.1)

3.5 (1.0)

2.9 (.8)

C

2.5 (.3)

5.4 (1.6)

5.4 (1.2)

5.5 (1.1)

5.2 (1.3)

4.9 (1.5)

Abbreviations: M = marathon runners; C = untrained controls.

* Significantly different from C group (p < 0.05). Rest, rec1, rec2, rec3, rec4, rec5: for a more detailed description, see Methods.