Transcutaneous Electrical Stimulation of Acupoints Changes Body Composition and Heart Rate Variability in Postmenopausal Women with Obesity
Table 3
Heart rate variability of the two study groups by mixed model.
Variables
Control (n = 20)
Experimental (n = 20)
P-value
HR (bpm)
Baseline
76.15 ± 11.71
75.95 ± 9.46
.093
4th week
75.20 ± 11.46†
71.70 ± 10.00†
.399
8th week
78.65 ± 12.17†
71.30 ± 7.54†
.060
12th week
75.75 ± 7.95†
71.20 ± 7.14†
.331
SDNN (ms)
Baseline
27.74 ± 12.63
28.95 ± 11.04
.609
4th week
25.29 ± 12.32
42.51 ± 21.62†
.024*
8th week
25.40 ± 13.25
37.47 ± 12.90
.029*
12th week
24.93 ± 12.75
37.84 ± 13.11
.105
RMSSD (ms)
Baseline
28.44 ± 16.40
22.94 ± 17.02
.079
4th week
32.83 ± 24.97
19.48 ± 11.81
.082
8th week
27.68 ± 15.69
20.40 ± 16.21
.125
12th week
26.16 ± 11.84
20.61 ± 13.33
.629
Total power (ms2)
Baseline
591.67 ± 479.69
830.37 ± 773.41
.225
4th week
589.58 ± 766.77
1837.12 ± 2060.79
.049*
8th week
608.76 ± 761.64
1160.05 ± 866.09
.066
12th week
553.31 ± 610.40
1272.76 ± 1126.29
.158
LF (ms2)
Baseline
177.61 ± 205.10
244.26 ± 270.26
.409
4th week
186.34 ± 434.22
498.67 ± 522.62
.130
8th week
157.74 ± 244.64
346.60 ± 336.71
.114
12th week
162.73 ± 233.30
433.18 ± 533.66
.360
HF (ms2)
Baseline
161.50 ± 229.62
185.87 ± 265.58
.643
4th week
113.33 ± 159.14
266.32 ± 383.74
.152
8th week
150.99 ± 232.14
183.19 ± 161.47
.420
12th week
127.57 ± 157.84
161.13 ± 120.27
.980
LF nu
Baseline
52.76 ± 25.30
57.22 ± 20.96
.285
4th week
64.04 ± 16.35
54.35 ± 16.58
.441
8th week
61.84 ± 18.12
55.28 ± 16.56
.902
12th week
61.94 ± 18.93
54.94 ± 16.24
.725
HF nu
Baseline
47.24 ± 25.30
42.78 ± 20.96
.285
4th week
35.96 ± 16.35
45.65 ± 16.58
.441
8th week
38.16 ± 18.12
44.72 ± 19.75
.902
12th week
38.06 ± 19.83
45.06 ± 16.24
.725
LF/HF ratio
Baseline
2.24 ± 2.36
2.47 ± 3.31
.541
4th week
1.56 ± 1.18
3.06 ± 3.70
.299
8th week
1.99 ± 2.37
2.62 ± 2.94
.644
12th week
1.50 ± 0.87
2.60 ± 2.37
.345
HR, heart rate; SDNN, standard deviation of normal-to-normal RR intervals; RMSSD, the square root of the mean squared differences of successive NN intervals; LF, low frequency; HF, high frequency; LF nu, LF in normalized unit ; HF nu, HF in normalized unit ; Data were presented as mean ± SD. Work, occupation and working stress were adjusted. Bonferroni correction with adjusted α-level (α′ = 0.05/3 = 0.0167) was used for multiple comparisons between each time point and the baseline.
*Significantly different between two groups, P < .05; †Significantly different between the present time point and the baseline, P < .0167.
