Effect of Line-Magnet Stimulation on HRV: A Double-Blind, Randomized, Crossover Trial
Abstract
:1. Introduction
2. Materials and Methods
3. Results
4. Discussion
5. Conclusions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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HRV | Post-FT | Post-BT | p Value | 95% Confidence Interval of the Difference | Cohen’s d | |
---|---|---|---|---|---|---|
Mean ± SD | Mean ± SD | Lower | Upper | |||
mHR (bpm) | 77.027 ± 0.193 | 77.185 ± 0.193 | 0.762 | −1.21 | 0.89 | 0.045 |
SDNN (ms) * | 55.374 ± 0.357 | 59.892 ± 0.449 | 0.029 | −8.55 | −0.50 | 0.338 |
RMSSD (ms) | 37.731 ± 0.327 | 38.448 ± 0.361 | 0.536 | −3.03 | 1.60 | 0.092 |
pNN50 (%) | 18.345 ± 0.334 | 18.904 ± 0.342 | 0.630 | −2.88 | 1.76 | 0.072 |
VLF (ms2) | 1295.012 ± 22.724 | 1552.13 ± 27.637 | 0.193 | −648.68 | 134.45 | 0.197 |
LF (ms2) ** | 774.7 ± 10.764 | 1062.04 ± 16.310 | 0.001 | −453.37 | −121.31 | 0.520 |
HF (ms2) | 557.341 ± 8.646 | 608.045 ± 9.626 | 0.179 | −125.45 | 24.04 | 0.204 |
LF/HF ** | 1.783 ± 0.024 | 2.426 ± 0.036 | 0.002 | −1.03 | −0.25 | 0.496 |
SD1 (ms) | 26.717 ± 0.231 | 27.225 ± 0.255 | 0.536 | −2.15 | 1.13 | 0.093 |
SD2 (ms) * | 73.262 ± 0.474 | 79.485 ± 0.684 | 0.022 | −12.14 | −1.00 | 0.354 |
SD1/SD2 * | 0.366 ± 0.002 | 0.339 ± 0.002 | 0.013 | 0.01 | 0.05 | 0.384 |
HRV | F, p | Group A | Group B | |||||
---|---|---|---|---|---|---|---|---|
Time | Time × Group | Pre-Test | Test 1 | Test 2 | Pre-Test | Test 1 | Test 2 | |
mHR (bpm) † | 6.392, 0.003 | 0.503, 0.928 | 79.30 ± 1.88 | 77.40 ± 1.83 | 77.65 ± 1.83 | 78.22 ± 1.92 | 76.38 ± 1.87 | 76.96 ± 1.88 |
SDNN (ms) †,‡ | 16.640, <0.001 | 6.597, 0.002 | 49.46 ± 3.57 | 55.91 ± 4.01 | 52.74 ± 3.54 | 47.82 ± 3.65 | 58.13 ± 4.10 | 64.06 ± 3.62 |
RMSSD (ms) | 1.517, 0.228 | 0.877, 0.394 | 34.91 ± 3.87 | 36.17 ± 3.29 | 34.83 ± 3.14 | 36.97 ± 3.69 | 40.77 ± 3.36 | 40.83 ± 3.21 |
pNN50 (%) | 1.376, 0.257 | 0.721, 0.462 | 15.24 ± 3.56 | 16.43 ± 3.16 | 14.44 ± 3.11 | 18.95 ± 3.63 | 22.43 ± 3.23 | 21.49 ± 3.18 |
VLF (ms2) † | 4.869, 0.014 | 1.262, 0.288 | 1025.88 ± 127.90 | 1567.53 ± 273.69 | 1222.65 ± 200.41 | 874.07 ± 130.78 | 1370.66 ± 279.84 | 1536.02 ± 204.91 |
LF (ms2) †,‡ | 3.640, 0.030 | 4.880, 0.010 | 696.87 ± 130.53 | 1111.03 ± 149.88 | 730.31 ± 108.32 | 743.99 ± 133.46 | 821.11 ± 153.24 | 1010.83 ± 110.76 |
HF (ms2) | 0.396, 0.572 | 0.977, 0.344 | 635.14 ± 161.89 | 542.80 ± 85.31 | 449.76 ± 83.98 | 643.65 ± 165.52 | 669.81 ± 87.22 | 676.25 ± 85.87 |
LF/HF ‡ | 2.016, 0.139 | 4.572, 0.013 | 1.82 ± 0.32 | 2.31 ± 0.23 | 1.95 ± 0.34 | 1.83 ± 0.33 | 1.61 ± 0.23 | 2.55 ± 0.34 |
SD1 (ms) | 1.519, 0.228 | 0.877, 0.394 | 24.72 ± 2.74 | 25.61 ± 2.33 | 24.66 ± 2.22 | 26.18 ± 2.80 | 28.87 ± 2.38 | 28.91 ± 2.27 |
SD2 (ms) †,‡ | 18.294, <0.001 | 7.091, 0.002 | 65.15 ± 4.45 | 74.56 ± 5.35 | 70.10 ± 4.67 | 62.00 ± 4.55 | 76.57 ± 5.47 | 85.35 ± 4.78 |
SD1/SD2 †,‡ | 6.514, 0.004 | 6.205, 0.005 | 0.36 ± 0.02 | 0.35 ± 0.02 | 0.36 ± 0.02 | 0.42 ± 0.02 | 0.37 ± 0.02 | 0.33 ± 0.02 |
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Jo, H.-G. Effect of Line-Magnet Stimulation on HRV: A Double-Blind, Randomized, Crossover Trial. Healthcare 2021, 9, 421. https://doi.org/10.3390/healthcare9040421
Jo H-G. Effect of Line-Magnet Stimulation on HRV: A Double-Blind, Randomized, Crossover Trial. Healthcare. 2021; 9(4):421. https://doi.org/10.3390/healthcare9040421
Chicago/Turabian StyleJo, Han-Gue. 2021. "Effect of Line-Magnet Stimulation on HRV: A Double-Blind, Randomized, Crossover Trial" Healthcare 9, no. 4: 421. https://doi.org/10.3390/healthcare9040421