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Table 1 Resting heart rate variability indices (N = 20)

From: Parasympathetic reactivation after maximal CPET depends on exercise modality and resting vagal activity in healthy men

Variables

Mean (SD)

Frequency domain

 

LF (ms2)

1708 (459)

HF (ms2)

2400 (1308)

LF (n.u.)

37 (10)

HF (n.u.)

44 (12)

LF:HF ratio

0.9 (0.5)

Time domain

 

R-R interval (ms)

1013 (163)

SDNN (ms)

92 (39)

rMSSD (ms)

104 (30)

  1. LF = low frequency component; HF = high frequency component; LF:HF ratio = sympathovagal balance; R-R interval = average of all normal R-R intervals; SDNN = standard deviation of all normal R-R intervals; rMSSD = square root of the sum of successive differences between adjacent normal R-R intervals squared.
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