. 2022 Oct 18;13:1009806. doi: 10.3389/fphys.2022.1009806

TABLE 3.

Effects of different sitting postures on heart rate variability (n = 12).

Index	NP	PE	FF	LLF	RLF	LR	RR
RR (ms)	797.24 ± 120.79	753.81 ± 93.6 ^e ^, ^g ^, ⁱ	790.52 ± 112.33 ^c	783.08 ± 103.78 ^c	789.75 ± 95.24 ^c ^, ^m	780.85 ± 92.05	772.04 ± 96.64 ⁱ
RMSSD (ms)	33 ± 14.75	27.5 ± 12.54	32.17 ± 18.31	27.83 ± 10.94 ⁱ	31.58 ± 12.94 ^g	31.75 ± 11.63	29.58 ± 13.34
lnHF (ms²)	6.95 ± 0.84	6.45 ± 0.81	6.54 ± 0.66	6.49 ± 0.59	6.68 ± 0.62	6.63 ± 0.74	6.49 ± 0.60
LF (ms²)	2044.87 ± 1622.97	1757.05 ± 844.45	1974.01 ± 1046.59	1417.19 ± 619.1 ^l	1891.11 ± 1368.34	1903.32 ± 1133.19^z	2055.71 ± 1040.37
LF/HF (%)	1.90 ± 1.38 ^c ^, ^e ^, ⁿ	3.00 ± 1.17 ^a	2.85 ± 1.41 ^a	3.03 ± 2.21	2.55 ± 1.18 ⁿ	3.05 ± 2.17 ^m	4.06 ± 2.19 ^b ^, ^j ^, ^k

Data are expressed as mean ± SD. NP, neutral position; PE, posterior extension; FF, forward flexion; LLF, left lateral flexion; RLF, right lateral flexion; LR, left rotation; RR, right rotation

Note: Between poses with statistical significance in Tables 2, 3:

^{^a}

p < 0.05 current posture vs. neutral position of the trunk posture

^{^b}

p < 0.01 current posture vs. neutral position of the trunk posture

^{^c}

p < 0.05 current posture vs. posterior extension position

^{^d}

p < 0.01 current posture vs. posterior extension position

^{^e}

p < 0.05 current posture vs. forward flexion position

^f p < 0.01 current posture vs. forward flexion position

^{^g}

p < 0.05 current posture vs. left lateral flexion position

^{^h}

p < 0.01 current posture vs. left lateral flexion position

^ⁱ

p < 0.05 current posture vs. right lateral flexion position

^{^j}

p < 0.01 current posture vs. right lateral flexion position

^{^k}

p < 0.05 current posture vs. left rotation position

^{^l}

p < 0.01 current posture vs. left rotation position

^{^m}

p < 0.05 current posture vs. right rotation position

^ⁿ

p < 0.01 current posture vs. right rotation position