Table 3

Heart rate variablility

Heart rate (beats/min)Total power
(ms2)
VLF
(ms2)
LF
(ms2)
HF
(ms2)
LF/HF
Whole period
 Athletes60 (6)1971 (609)944 (284)673 (244)353 (349)3.07 (1.30)
 Controls69 (4)1370 (447)668 (173)492 (290)209 (172)3.30 (1.27)
 p value0.0080.0340.0320.0890.1250.710
Night (0000–0500)
 Athletes53 (5)2102 (964)863 (267)764 (327)475 (654)3.07 (1.77)
 Controls59 (3)1945 (739)889 (398)728 (485)328 (48)3.26 (1.96)
 p value0.0110.7700.9830.6970.6080.823
Day (0730–2130)
 Athletes66 (9)1788 (577)934 (331)587 (250)267 (163)3.05 (1.34)
 Controls76 (7)1013 (342)539 (152)346 (177)127 (41)3.44 (0.82)
 p value0.0130.0050.0090.0210.0100.491
  • Frequency domain measures of RR variability in male veteran athletes and healthy controls obtained from 48 hour ambulatory ECGs. Values are mean (SD).

  • Total power, 0.0033–0.40 Hz, (ms2); VLF, very low frequency power, 0.0033–0.04 Hz; LF, low frequency power, 0.04–0.15 Hz; HF, high frequency power, 0.15–0.40 Hz.