Table 4.
Electrocardiogram signal quality—freshwater immersion with movement condition.
| Parameter | Ag/AgCl | PLS | p-Value | Ag/AgCl | PLP | p-Value | |
|---|---|---|---|---|---|---|---|
| Temporal measures of HRV | meanNN(ms) | 1130.0 ± 799.9 | 753.1 ± 171.5 | 0.0205 | 1146.3 ± 1055.1 | 728.0 ± 139.0 | 0.0145 |
| SDNN (ms) | 754.4 ± 383.7 | 152.6 ± 70.1 | 0.0087 | 834.0 ± 620.1 | 122.2 ± 53.5 | 0.0060 | |
| RMSSD (ms) | 1010.2 ± 579.7 | 199.0 ± 103.1 | 0.0151 | 1109.0 ± 832.3 | 156.3 ± 72.8 | 0.0061 | |
| NN50 | 117.4 ± 17.03 | 48.6 ± 32.02 | 0.0028 | 83.12 ± 51.48 | 28.62 ± 18.2 | 0.0136 | |
| Spectral measures of HRV | LF (ms2) | 223079 ± 24173 | 4007 ± 3893 | 0.0773 | 168449 ± 189442 | 3319 ± 2135 | 0.0272 |
| HF (ms2) | 354946 ± 44101 | 8967 ± 12222 | 0.1176 | 348641 ± 392893 | 6166 ± 4855 | 0.0272 | |
| Total (ms2) | 2336098 ± 1864 | 535985 ± 10881 | 0.0633 | 2268620 ± 2114 | 475750 ± 69503 | 0.0310 | |
| LF/HF | 0.72 ± 0.72 | 0.74 ± 0.61 | 0.9582 | 0.61 ± 0.22 | 0.80 ± 0.61 | 0.4278 | |
| Corr-Coef | r (unitless) | 0.19 ± 0.11 | 0.51 ± 0.16 | 0.0000 | 0.19 ± 0.11 | 0.45 ± 0.21 | 0.0000 |