Table 7.
Electrocardiogram signal quality—saltwater immersion with movement condition.
| Parameter | Ag/AgCl | PLS | p-Value | Ag/AgCl | PLP | p-Value | |
|---|---|---|---|---|---|---|---|
| Temporal measures of HRV | meanNN(ms) | 1454 ± 223 | 938 ± 124 | 0.0020 | 1277 ± 355 | 851 ± 120 | 7.11e-04 |
| SDNN (ms) | 1102 ± 315 | 497 ± 190 | 0.0054 | 872 ± 412 | 335 ± 243 | 7.92e-04 | |
| RMSSD (ms) | 1481 ± 309 | 677 ± 265 | 0.0023 | 1197 ± 558 | 448 ± 293 | 4.53e-04 | |
| NN50 | 132.2 ± 41.2 | 117.6 ± 22.9 | 0.5072 | 171.8 ± 116.5 | 102.1 ± 58.5 | 0.0785 | |
| Spectral measures of HRV | LF (ms2) | 296431 ± 35372 | 45736 ± 29809 | 0.1529 | 174843 ± 241251 | 26346 ± 30832 | 0.0459 |
| HF (ms2) | 531535 ± 37302 | 146587 ± 10063 | 0.0564 | 439754 ± 499125 | 57801 ± 58326 | 0.0151 | |
| Total (ms2) | 2984351 ± 1396 | 1088667 ± 4357 | 0.0199 | 2459872 ± 20369 | 748602 ± 261051 | 0.0085 | |
| LF/HF | 0.4661 ± 0.2187 | 0.3257 ± 0.0298 | 0.1928 | 0.4170 ± 0.1328 | 0.4440 ± 0.1370 | 0.6284 | |
| Corr-Coef | r (unitless) | 0.21 ± 0.14 | 0.51 ± 0.17 | 0.0000 | 0.21 ± 0.14 | 0.63 ± 0.13 | 0.0000 |