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Table 2 Changes in Frequency domain measures from baseline to 24-h post-race (n = 16)

From: The effects of a 3-day mountain bike cycling race on the autonomic nervous system (ANS) and heart rate variability in amateur cyclists: a prospective quantitative research design

 

TP (ms)

HF (ms)

LF (ms)

VLF (ms)

LF/HF (%)

Measurement

Mean ± SD

p value

Mean ± SD

p value

Mean ± SD

p value

Mean ± SD

p value

Mean ± SD

p value

Frequency domain measures

Baseline

2847.06 ± 3127.77

930.56 ± 1133.74

1012.44 ± 1271.96

904.13 ± 1230.69

1.43 ± 0.88

Day 1

512.56 ± 499.47

 < 0.001*

60.25 ± 67.39

 < 0.01*

215.69 ± 180.74

 < 0.01*

236.56 ± 268.88

0.02*

6.23 ± 6.73

0.02*

Day 2

465.06 ± 624.08

 < 0.01*

35.19 ± 38.23

 < 0.01*

299.31 ± 534.66

0.07

130.69 ± 135.55

0.03*

8.24 ± 6.93

 < 0.001*

Day 3

562.94 ± 945.72

 < 0.01*

137.94 ± 347.65

0.02*

296.13 ± 522.87

0.07

129.00 ± 133.87

0.02*

5.14 ± 4.37

 < 0.001*

24-Hour post-race

1807.38 ± 1770.36

0.23

523.88 ± 705.22

0.19

739.75 ± 1175.16

0.50

543.75 ± 445.89

0.30

2.09 ± 1.46

0.11

  1. TP total power of overall RR-intervals; HF high-frequency power; LF low-frequency power; VLF very low-frequency power; LF/HF ratio between low-frequency power and high-frequency power, ms milliseconds
  2. *Level of significant differences between baseline and each race (p ≤ 0.05)