Table 1 Breath rate and HRV measures in HFYB sessions.

Breath rate (breaths/min)

16.45 ± 2.61

60.64 ± 7.39***

61.13 ± 7.24***

62.54 ± 7.58***

16.02 ± 2.87

16.66 ± 3.09

16.55 ± 3.30

LF (nu)

72.37 ± 2.86

71.80 ± 6.68

71.85 ± 6.57

72.52 ± 6.00

71.72 ± 2.67

72.36 ± 2.43

73.05 ± 2.74

HF (nu)

27.63 ± 2.86

28.20 ± 6.68

28.15 ± 6.57

27.48 ± 6.00

28.28 ± 2.67

27.64 ± 2.43

26.95 ± 2.74

LF/HF (nu)

2.67 ± 0.53

2.67 ± 0.57

2.68 ± 0.59

2.75 ± 0.54

2.57 ± 0.32

2.64 ± 0.31

2.75 ± 0.40

Mean RR (sec)

0.98 ± 0.17

0.84 ± 0.14***

0.84 ± 0.14***

0.84 ± 0.12***

0.96 ± 0.15

0.96 ± 0.15

0.93 ± 0.14**

NN50 (count)

132.03 ± 55.02

40.76 ± 60.03***

38.16 ± 65.65***

40.00 ± 60.14***

129.03 ± 56.43

126.58 ± 56.29

115.63 ± 56.24

pNN50 (%)

44.76 ± 21.51

11.39 ± 15.31***

10.55 ± 16.79***

11.53 ± 16.92***

42.77 ± 21.49

41.79 ± 21.50

37.40 ± 21.15*